Reference Data
Area Code Directory
Area Code 443 — Baltimore, Pikesville, Columbia, Maryland

Area Code 443 — Baltimore, Pikesville, Columbia, Maryland

Active

Data last updated: March 10, 2026

State
Maryland
Country
US
Timezone
America/New_York
Assigned
January 10, 2001
Exchanges (NXX)
785
Carriers
26
Rate Centers
81
Overlay
Yes — 410, 667

Top Carriers

Carrier OCN NXX Count
PAETEC ITEL, LLC 829J 153
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 121
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 94
NEW CINGULAR WIRELESS PCS, LLC - DC 4036 71
LEVEL 3 COMMUNICATIONS, LLC - MD 6119 69
VERIZON MARYLAND, INC. 9212 55
TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 48
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 46
CORE COMMUNICATIONS, INC.- MD 2593 34
METROPCS, INC. 5562 25

Rate Centers

WOODLAWN WESTMINSTR BALTIMORE WEST RIVER PIKESVILLE CAMBRIDGE PERRYVILLE ELKTON HAVREGRACE SALISBURY SPARKSGLNC ANNAPOLIS CHESTERTN DUNDALK WORTHINGTN PARKVILLE PT DEPOSIT CHASE SEVERNA PK ODENTON ESSEX WILLARDS VIENNA SNOW HILL CARDIFF NORTHBEACH PARKTON EASTON SPARROWSPT FALLSTON UNION BDG STEVENSVL CATONSVL NORTH EAST COLUMBIA CENTREVL FORK GLENWOOD DARLINGTON TOWSON GLENBURNIE RANDALLSTN REISTERSTN SEVERN SYKESVILLE COCKEYSVL WATERLO238 ELLICOTTCY HAMPSTEAD CROFTON PRINCEFRCK ARBUTUS ABERDEEN ARGRGBSNIS BEL AIR BRYNPKLNCM SHARPTOWN WATERLO236 TANEYTOWN SHERWD FOR SOLOMONS MILLERSVL SILVER RUN DELMAR EDGEWOOD OCEAN CITY POCOMOKE CHURCHVL PRINCEANNE FEDERALSBG TRAPPE ELKRIDGE QUEENSTOWN DENTON JARRETTSVL BERLIN CHESAPKECY NEWWINDSOR NANTICOKE CRISFIELD BISHOPVL

Exchange Listings (NXX)

NPA-NXX Carrier Rate Center Type LATA Status
443-200 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WOODLAWN Landline 238 active
443-201 NEW CINGULAR WIRELESS PCS, LLC - DC WESTMINSTR Wireless 238 active
443-202 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-203 VERIZON MARYLAND, INC. WEST RIVER Landline 238 active
443-204 NEW CINGULAR WIRELESS PCS, LLC - DC PIKESVILLE Wireless 238 active
443-205 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD CAMBRIDGE Wireless 242 active
443-206 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD PERRYVILLE Wireless 238 active
443-207 OMNIPOINT COMMUNICATIONS ENTERPRISES, LP ELKTON Wireless 238 active
443-208 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-209 PAETEC ITEL, LLC HAVREGRACE VoIP 238 active
443-210 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC SALISBURY Wireless 242 active
443-212 PAETEC ITEL, LLC SPARKSGLNC VoIP 238 active
443-213 VERIZON MARYLAND, INC. PIKESVILLE Landline 238 active
443-214 NEW CINGULAR WIRELESS PCS, LLC - DC ANNAPOLIS Wireless 238 active
443-215 CORE COMMUNICATIONS, INC.- MD CHESTERTN Landline 242 active
443-216 PAETEC ITEL, LLC DUNDALK VoIP 238 active
443-217 CORE COMMUNICATIONS, INC.- MD ANNAPOLIS Landline 238 active
443-218 LEVEL 3 COMMUNICATIONS, LLC - MD WORTHINGTN Landline 238 active
443-219 LEVEL 3 COMMUNICATIONS, LLC - MD PARKVILLE Landline 238 active
443-220 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
443-221 LEVEL 3 COMMUNICATIONS, LLC - MD ANNAPOLIS Landline 238 active
443-222 ONVOY, LLC - MD WORTHINGTN Landline 238 active
443-223 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
443-224 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD BALTIMORE Landline 238 active
443-225 METROPCS, INC. CAMBRIDGE Wireless 242 active
443-226 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-227 PAETEC ITEL, LLC PT DEPOSIT VoIP 238 active
443-228 PAETEC ITEL, LLC CHASE VoIP 238 active
443-229 PAETEC ITEL, LLC SEVERNA PK VoIP 238 active
443-230 PAETEC ITEL, LLC ODENTON VoIP 238 active
443-231 TELEPORT COMMUNICATIONS AMERICA, LLC - MD ESSEX VoIP 238 active
443-232 CORE COMMUNICATIONS, INC.- MD WILLARDS Landline 242 active
443-233 PAETEC ITEL, LLC VIENNA VoIP 242 active
443-234 PAETEC ITEL, LLC SNOW HILL VoIP 242 active
443-235 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD SALISBURY Wireless 242 active
443-236 CORE COMMUNICATIONS, INC.- MD CARDIFF Landline 238 active
443-237 CORE COMMUNICATIONS, INC.- MD NORTHBEACH Landline 238 active
443-238 PAETEC ITEL, LLC PARKTON VoIP 238 active
443-239 NEW CINGULAR WIRELESS PCS, LLC - DC EASTON Wireless 242 active
443-240 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-241 ONVOY, LLC - MD WESTMINSTR Landline 238 active
443-242 PAETEC ITEL, LLC SPARROWSPT VoIP 238 active
443-243 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD FALLSTON Wireless 238 active
443-244 LEVEL 3 COMMUNICATIONS, LLC - MD WESTMINSTR Landline 238 active
443-245 PAETEC ITEL, LLC ELKTON VoIP 238 active
443-246 CORE COMMUNICATIONS, INC.- MD ELKTON Landline 238 active
443-247 PAETEC ITEL, LLC UNION BDG VoIP 238 active
443-248 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-249 VERIZON MARYLAND, INC. STEVENSVL Landline 242 active
443-250 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-251 ONVOY, LLC - MD CATONSVL Landline 238 active
443-252 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD PERRYVILLE Wireless 238 active
443-253 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-254 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC ANNAPOLIS Wireless 238 active
443-255 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-256 PAETEC ITEL, LLC NORTH EAST VoIP 238 active
443-257 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-258 NEW CINGULAR WIRELESS PCS, LLC - DC EASTON Wireless 242 active
443-259 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
443-260 VERIZON MARYLAND, INC. SALISBURY Landline 242 active
443-261 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD SEVERNA PK Landline 238 active
443-262 VERIZON MARYLAND, INC. CENTREVL Landline 242 active
443-263 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
443-264 CORE COMMUNICATIONS, INC.- MD PIKESVILLE Landline 238 active
443-265 PAETEC ITEL, LLC FORK VoIP 238 active
443-266 BANDWIDTH.COM CLEC, LLC - MD GLENWOOD VoIP 238 active
443-267 TELEPORT COMMUNICATIONS AMERICA, LLC - MD DARLINGTON Landline 238 active
443-268 CORE COMMUNICATIONS, INC.- MD BALTIMORE Landline 238 active
443-269 CORE COMMUNICATIONS, INC.- MD TOWSON Landline 238 active
443-270 PAETEC ITEL, LLC GLENBURNIE VoIP 238 active
443-271 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-272 TELEPORT COMMUNICATIONS AMERICA, LLC - MD RANDALLSTN Landline 238 active
443-273 TELEPORT COMMUNICATIONS AMERICA, LLC - MD REISTERSTN Landline 238 active
443-274 VERIZON MARYLAND, INC. SEVERN Landline 238 active
443-275 COMCAST IP PHONE, LLC TOWSON VoIP 238 active
443-276 MCIMETRO ACCESS TRANSMISSION SERVICES LLC COLUMBIA Landline 238 active
443-277 METROPCS, INC. SYKESVILLE Wireless 238 active
443-278 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD BALTIMORE Landline 238 active
443-279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC TOWSON Landline 238 active
443-280 NEW CINGULAR WIRELESS PCS, LLC - DC SYKESVILLE Wireless 238 active
443-281 MCIMETRO ACCESS TRANSMISSION SERVICES LLC COCKEYSVL Landline 238 active
443-282 METROPCS, INC. CHESTERTN Wireless 242 active
443-283 PAETEC ITEL, LLC COLUMBIA VoIP 238 active
443-284 CORE COMMUNICATIONS, INC.- MD WATERLO238 Landline 238 active
443-285 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
443-286 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-287 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
443-288 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ELLICOTTCY Landline 238 active
443-289 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD WESTMINSTR Landline 238 active
443-290 LEVEL 3 TELECOM OF MARYLAND, LLC - MD PARKVILLE Landline 238 active
443-291 LEVEL 3 COMMUNICATIONS, LLC - MD HAMPSTEAD Landline 238 active
443-292 LEVEL 3 COMMUNICATIONS, LLC - MD CROFTON Landline 238 active
443-293 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WESTMINSTR Wireless 238 active
443-294 BANDWIDTH.COM CLEC, LLC - MD WEST RIVER VoIP 238 active
443-295 LEVEL 3 COMMUNICATIONS, LLC - MD PRINCEFRCK Landline 238 active
443-296 LEVEL 3 COMMUNICATIONS, LLC - MD WATERLO238 Landline 238 active
443-297 TELEPORT COMMUNICATIONS AMERICA, LLC - MD ARBUTUS Landline 238 active
443-298 NEW CINGULAR WIRELESS PCS, LLC - DC EASTON Wireless 242 active
443-299 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD FALLSTON Wireless 238 active
443-300 LEVEL 3 COMMUNICATIONS, LLC - MD SYKESVILLE Landline 238 active
443-301 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-302 LEVEL 3 COMMUNICATIONS, LLC - MD CROFTON Landline 238 active
443-303 LEVEL 3 COMMUNICATIONS, LLC - MD ABERDEEN Landline 238 active
443-304 BANDWIDTH.COM CLEC, LLC - MD ARBUTUS VoIP 238 active
443-305 LEVEL 3 COMMUNICATIONS, LLC - MD ARGRGBSNIS Landline 238 active
443-306 METROPCS, INC. SEVERNA PK Wireless 238 active
443-307 LEVEL 3 COMMUNICATIONS, LLC - MD BEL AIR Landline 238 active
443-308 MCIMETRO ACCESS TRANSMISSION SERVICES LLC SEVERN Landline 238 active
443-309 METROPCS, INC. ELKTON Wireless 238 active
443-310 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-312 LEVEL 3 COMMUNICATIONS, LLC - MD BRYNPKLNCM Landline 238 active
443-313 LEVEL 3 COMMUNICATIONS, LLC - MD FORK Landline 238 active
443-314 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-315 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
443-316 LEVEL 3 COMMUNICATIONS, LLC - MD WOODLAWN Landline 238 active
443-317 BANDWIDTH.COM CLEC, LLC - MD CHASE VoIP 238 active
443-318 PAETEC ITEL, LLC COCKEYSVL VoIP 238 active
443-319 PAETEC ITEL, LLC COLUMBIA VoIP 238 active
443-320 LEVEL 3 COMMUNICATIONS, LLC - MD BALTIMORE Landline 238 active
443-321 PAETEC ITEL, LLC ANNAPOLIS VoIP 238 active
443-322 PAETEC ITEL, LLC TOWSON VoIP 238 active
443-323 PAETEC ITEL, LLC SHARPTOWN VoIP 242 active
443-324 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-325 PAETEC ITEL, LLC ELLICOTTCY VoIP 238 active
443-326 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-327 PAETEC ITEL, LLC ABERDEEN VoIP 238 active
443-328 PAETEC ITEL, LLC SYKESVILLE VoIP 238 active
443-329 LEVEL 3 COMMUNICATIONS, LLC - MD WATERLO236 Landline 236 active
443-330 PAETEC ITEL, LLC COCKEYSVL VoIP 238 active
443-331 PAETEC ITEL, LLC TANEYTOWN VoIP 238 active
443-332 PAETEC ITEL, LLC CROFTON VoIP 238 active
443-333 NEW CINGULAR WIRELESS PCS, LLC - DC ANNAPOLIS Wireless 238 active
443-334 MCIMETRO ACCESS TRANSMISSION SERVICES LLC PIKESVILLE Landline 238 active
443-335 METROPCS, INC. BRYNPKLNCM Wireless 238 active
443-336 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC ANNAPOLIS Wireless 238 active
443-337 CORE COMMUNICATIONS, INC.- MD SPARROWSPT Landline 238 active
443-338 PAETEC ITEL, LLC SPARKSGLNC VoIP 238 active
443-339 PAETEC ITEL, LLC SHERWD FOR VoIP 238 active
443-340 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WESTMINSTR Wireless 238 active
443-341 LEVEL 3 COMMUNICATIONS, LLC - MD CATONSVL Landline 238 active
443-342 PAETEC ITEL, LLC SOLOMONS VoIP 238 active
443-343 TELEPORT COMMUNICATIONS AMERICA, LLC - MD MILLERSVL Landline 238 active
443-344 CORE COMMUNICATIONS, INC.- MD SEVERNA PK Landline 238 active
443-345 LEVEL 3 COMMUNICATIONS, LLC - MD ABERDEEN Landline 238 active
443-346 CORE COMMUNICATIONS, INC.- MD SEVERNA PK Landline 238 active
443-347 PAETEC ITEL, LLC CARDIFF VoIP 238 active
443-348 TELEPORT COMMUNICATIONS AMERICA, LLC - MD WOODLAWN Landline 238 active
443-349 CORE COMMUNICATIONS, INC.- MD SILVER RUN Landline 238 active
443-350 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ELKTON Wireless 238 active
443-351 PAETEC ITEL, LLC ODENTON VoIP 238 active
443-352 LEVEL 3 COMMUNICATIONS, LLC - MD PIKESVILLE Landline 238 active
443-353 VERIZON MARYLAND, INC. COCKEYSVL Landline 238 active
443-354 LEVEL 3 COMMUNICATIONS, LLC - MD GLENBURNIE Landline 238 active
443-355 LEVEL 3 COMMUNICATIONS, LLC - MD ELLICOTTCY Landline 238 active
443-356 LEVEL 3 COMMUNICATIONS, LLC - MD BEL AIR Landline 238 active
443-357 VERIZON MARYLAND, INC. PIKESVILLE Landline 238 active
443-358 YMAX COMMUNICATIONS CORP. - MD SALISBURY Landline 242 active
443-359 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD DELMAR Wireless 242 active
443-360 TELEPORT COMMUNICATIONS AMERICA, LLC - MD ABERDEEN Landline 238 active
443-361 CORE COMMUNICATIONS, INC.- MD SYKESVILLE Landline 238 active
443-362 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC EASTON Wireless 242 active
443-363 CORE COMMUNICATIONS, INC.- MD SEVERN Landline 238 active
443-364 TELEPORT COMMUNICATIONS AMERICA, LLC - MD ELLICOTTCY Landline 238 active
443-365 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC SALISBURY Wireless 242 active
443-366 METROPCS, INC. SALISBURY Wireless 242 active
443-367 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
443-368 CORE COMMUNICATIONS, INC.- MD WESTMINSTR Landline 238 active
443-369 CORE COMMUNICATIONS, INC.- MD BEL AIR Landline 238 active
443-370 NEW CINGULAR WIRELESS PCS, LLC - DC ANNAPOLIS Wireless 238 active
443-371 LEVEL 3 COMMUNICATIONS, LLC - MD BEL AIR Landline 238 active
443-372 PAETEC ITEL, LLC EDGEWOOD VoIP 238 active
443-373 METROPCS, INC. OCEAN CITY Wireless 242 active
443-374 PAETEC ITEL, LLC ABERDEEN VoIP 238 active
443-375 METROPCS, INC. HAMPSTEAD Wireless 238 active
443-376 TELEPORT COMMUNICATIONS AMERICA, LLC - MD DUNDALK Landline 238 active
443-377 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD TOWSON Wireless 238 active
443-378 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-379 COMCAST IP PHONE, LLC PIKESVILLE VoIP 238 active
443-380 LEVEL 3 COMMUNICATIONS, LLC - MD WOODLAWN Landline 238 active
443-381 NEW CINGULAR WIRELESS PCS, LLC - DC REISTERSTN Wireless 238 active
443-382 CORE COMMUNICATIONS, INC.- MD CAMBRIDGE Landline 242 active
443-383 PAETEC ITEL, LLC SILVER RUN VoIP 238 active
443-384 PAETEC ITEL, LLC PARKVILLE VoIP 238 active
443-385 CORE COMMUNICATIONS, INC.- MD EASTON Landline 242 active
443-386 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-387 CORE COMMUNICATIONS, INC.- MD POCOMOKE Landline 242 active
443-388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-389 CORE COMMUNICATIONS, INC.- MD SALISBURY Landline 242 active
443-390 BANDWIDTH.COM CLEC, LLC - MD CHURCHVL VoIP 238 active
443-391 LEVEL 3 COMMUNICATIONS, LLC - MD COCKEYSVL Landline 238 active
443-392 TELEPORT COMMUNICATIONS AMERICA, LLC - MD BALTIMORE VoIP 238 active
443-393 LEVEL 3 COMMUNICATIONS, LLC - MD COLUMBIA Landline 238 active
443-394 VERIZON MARYLAND, INC. PIKESVILLE Landline 238 active
443-395 VERIZON MARYLAND, INC. ABERDEEN Landline 238 active
443-396 LEVEL 3 COMMUNICATIONS, LLC - MD ODENTON Landline 238 active
443-397 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD SALISBURY Wireless 242 active
443-398 METROPCS, INC. SYKESVILLE Wireless 238 active
443-399 ONVOY, LLC - MD DUNDALK Landline 238 active
443-400 MCIMETRO ACCESS TRANSMISSION SERVICES LLC BRYNPKLNCM Landline 238 active
443-401 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-402 TELEPORT COMMUNICATIONS AMERICA, LLC - MD EDGEWOOD Landline 238 active
443-403 LEVEL 3 COMMUNICATIONS, LLC - MD ABERDEEN Landline 238 active
443-404 METROPCS, INC. SOLOMONS Wireless 238 active
443-405 COMCAST IP PHONE, LLC RANDALLSTN VoIP 238 active
443-406 TELEPORT COMMUNICATIONS AMERICA, LLC - MD ELKTON Landline 238 active
443-407 MCIMETRO ACCESS TRANSMISSION SERVICES LLC DUNDALK Landline 238 active
443-408 MCIMETRO ACCESS TRANSMISSION SERVICES LLC SPARROWSPT Landline 238 active
443-409 PAETEC ITEL, LLC EDGEWOOD VoIP 238 active
443-410 CENTURYLINK COMMUNICATIONS, LLC GLENBURNIE VoIP 238 active
443-412 TELEPORT COMMUNICATIONS AMERICA, LLC - MD CHURCHVL Landline 238 active
443-413 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-414 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-415 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-416 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-417 TELEPORT COMMUNICATIONS AMERICA, LLC - MD FALLSTON Landline 238 active
443-418 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-419 PAETEC ITEL, LLC GLENWOOD VoIP 238 active
443-420 BANDWIDTH.COM CLEC, LLC - MD ELLICOTTCY VoIP 238 active
443-421 NEW CINGULAR WIRELESS PCS, LLC - DC FORK Wireless 238 active
443-422 NEW CINGULAR WIRELESS PCS, LLC - DC GLENBURNIE Wireless 238 active
443-423 LEVEL 3 COMMUNICATIONS, LLC - MD BALTIMORE Landline 238 active
443-424 TELEPORT COMMUNICATIONS AMERICA, LLC - MD CARDIFF Landline 238 active
443-425 TELEPORT COMMUNICATIONS AMERICA, LLC - MD PARKVILLE VoIP 238 active
443-426 PAETEC ITEL, LLC RANDALLSTN VoIP 238 active
443-427 CORE COMMUNICATIONS, INC.- MD PRINCEANNE Landline 242 active
443-428 CORE COMMUNICATIONS, INC.- MD COCKEYSVL Landline 238 active
443-429 PAETEC ITEL, LLC WOODLAWN VoIP 238 active
443-430 MCIMETRO ACCESS TRANSMISSION SERVICES LLC COLUMBIA Landline 238 active
443-431 CORE COMMUNICATIONS, INC.- MD RANDALLSTN Landline 238 active
443-432 PAETEC ITEL, LLC PRINCEFRCK VoIP 238 active
443-433 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ANNAPOLIS Landline 238 active
443-434 TELNYX LLC FEDERALSBG VoIP 242 active
443-435 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-436 VERIZON MARYLAND, INC. WOODLAWN Landline 238 active
443-437 TELEPORT COMMUNICATIONS AMERICA, LLC - MD POCOMOKE VoIP 242 active
443-438 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-439 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD TRAPPE Wireless 242 active
443-440 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ANNAPOLIS Landline 238 active
443-441 TELEPORT COMMUNICATIONS AMERICA, LLC - MD GLENWOOD Landline 238 active
443-442 PAETEC ITEL, LLC PARKVILLE VoIP 238 active
443-443 COMMIO, LLC ARBUTUS VoIP 238 active
443-444 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
443-445 VERIZON MARYLAND, INC. ELKRIDGE Landline 238 active
443-446 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD QUEENSTOWN Landline 242 active
443-447 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-448 COMCAST IP PHONE, LLC DENTON VoIP 242 active
443-449 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
443-450 LEVEL 3 COMMUNICATIONS, LLC - MD PIKESVILLE Landline 238 active
443-451 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
443-452 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
443-453 ONVOY, LLC - MD BALTIMORE Landline 238 active
443-454 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC ANNAPOLIS Wireless 238 active
443-455 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
443-456 COMCAST IP PHONE, LLC EDGEWOOD VoIP 238 active
443-457 TELEPORT COMMUNICATIONS AMERICA, LLC - MD BRYNPKLNCM Landline 238 active
443-458 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ANNAPOLIS Landline 238 active
443-459 PAETEC ITEL, LLC ELKRIDGE VoIP 238 active
443-460 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ESSEX Landline 238 active
443-461 PAETEC ITEL, LLC PARKVILLE VoIP 238 active
443-462 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-463 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-464 PAETEC ITEL, LLC CHURCHVL VoIP 238 active
443-465 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD TOWSON Wireless 238 active
443-466 METROPCS, INC. ELKTON Wireless 238 active
443-467 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-468 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-469 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-470 PAETEC ITEL, LLC TOWSON VoIP 238 active
443-471 PAETEC ITEL, LLC PIKESVILLE VoIP 238 active
443-472 LEVEL 3 COMMUNICATIONS, LLC - MD COLUMBIA Landline 238 active
443-473 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-474 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
443-475 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD BALTIMORE Landline 238 active
443-476 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
443-477 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD CAMBRIDGE Wireless 242 active
443-478 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-479 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
443-480 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD CHESTERTN Wireless 242 active
443-481 PAETEC ITEL, LLC ANNAPOLIS VoIP 238 active
443-482 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
443-483 LEVEL 3 COMMUNICATIONS, LLC - MD CARDIFF Landline 238 active
443-484 LEVEL 3 COMMUNICATIONS, LLC - MD EDGEWOOD Landline 238 active
443-485 LEVEL 3 COMMUNICATIONS, LLC - MD ELKTON Landline 238 active
443-486 LEVEL 3 COMMUNICATIONS, LLC - MD PRINCEFRCK Landline 238 active
443-487 LEVEL 3 COMMUNICATIONS, LLC - MD WESTMINSTR Landline 238 active
443-488 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-489 TELEPORT COMMUNICATIONS AMERICA, LLC - MD CHASE Landline 238 active
443-490 BANDWIDTH.COM CLEC, LLC - MD EDGEWOOD VoIP 238 active
443-491 ONVOY, LLC - MD PARKTON Landline 238 active
443-492 LEVEL 3 COMMUNICATIONS, LLC - MD ELKRIDGE Landline 238 active
443-493 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD DELMAR Wireless 242 active
443-494 BANDWIDTH.COM CLEC, LLC - MD MILLERSVL VoIP 238 active
443-495 BANDWIDTH.COM CLEC, LLC - MD PARKVILLE VoIP 238 active
443-496 METROPCS, INC. EASTON Wireless 242 active
443-497 METROPCS, INC. SALISBURY Wireless 242 active
443-498 MCIMETRO ACCESS TRANSMISSION SERVICES LLC CATONSVL Landline 238 active
443-499 BANDWIDTH.COM CLEC, LLC - MD JARRETTSVL VoIP 238 active
443-500 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-501 LEVEL 3 COMMUNICATIONS, LLC - MD PIKESVILLE Landline 238 active
443-502 TELEPORT COMMUNICATIONS AMERICA, LLC - MD HAVREGRACE Landline 238 active
443-503 MCIMETRO ACCESS TRANSMISSION SERVICES LLC DUNDALK Landline 238 active
443-504 PAETEC ITEL, LLC FALLSTON VoIP 238 active
443-505 LEVEL 3 COMMUNICATIONS, LLC - MD ESSEX Landline 238 active
443-506 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-507 TELEPORT COMMUNICATIONS AMERICA, LLC - MD HAMPSTEAD Landline 238 active
443-508 PAETEC ITEL, LLC HAMPSTEAD VoIP 238 active
443-509 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-510 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
443-512 VERIZON MARYLAND, INC. EDGEWOOD Landline 238 active
443-513 NEW CINGULAR WIRELESS PCS, LLC - DC BERLIN Wireless 242 active
443-514 PAETEC ITEL, LLC CATONSVL VoIP 238 active
443-515 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD CAMBRIDGE Wireless 242 active
443-516 ONVOY, LLC - MD SYKESVILLE Landline 238 active
443-517 LEVEL 3 COMMUNICATIONS, LLC - MD GLENBURNIE Landline 238 active
443-518 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
443-519 LEVEL 3 COMMUNICATIONS, LLC - MD TOWSON Landline 238 active
443-520 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
443-521 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD CAMBRIDGE Wireless 242 active
443-522 PAETEC ITEL, LLC REISTERSTN VoIP 238 active
443-523 VERIZON MARYLAND, INC. SALISBURY Landline 242 active
443-524 MCIMETRO ACCESS TRANSMISSION SERVICES LLC BALTIMORE Landline 238 active
443-525 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-526 PAETEC ITEL, LLC HAVREGRACE VoIP 238 active
443-527 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-528 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BEL AIR Wireless 238 active
443-529 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-530 PAETEC ITEL, LLC DUNDALK VoIP 238 active
443-531 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-532 METROPCS, INC. PRINCEFRCK Wireless 238 active
443-533 TELEPORT COMMUNICATIONS AMERICA, LLC - MD JARRETTSVL Landline 238 active
443-534 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
443-535 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
443-536 METROPCS, INC. WESTMINSTR Wireless 238 active
443-537 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD COLUMBIA Wireless 238 active
443-538 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC COLUMBIA Wireless 238 active
443-539 PAETEC ITEL, LLC COLUMBIA VoIP 238 active
443-540 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-541 PAETEC ITEL, LLC COCKEYSVL VoIP 238 active
443-542 COMCAST IP PHONE, LLC COLUMBIA VoIP 238 active
443-543 VERIZON MARYLAND, INC. ARBUTUS Landline 238 active
443-544 PAETEC ITEL, LLC PIKESVILLE VoIP 238 active
443-545 LEVEL 3 COMMUNICATIONS, LLC - MD COLUMBIA Landline 238 active
443-546 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
443-547 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WESTMINSTR Wireless 238 active
443-548 MCIMETRO ACCESS TRANSMISSION SERVICES LLC PIKESVILLE Landline 238 active
443-549 PAETEC ITEL, LLC DUNDALK VoIP 238 active
443-550 LEVEL 3 COMMUNICATIONS, LLC - MD NORTHBEACH Landline 238 active
443-551 LEVEL 3 COMMUNICATIONS, LLC - MD WOODLAWN Landline 238 active
443-552 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
443-553 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ELKTON Wireless 238 active
443-554 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC CHASE Wireless 238 active
443-556 VERIZON MARYLAND, INC. COCKEYSVL Landline 238 active
443-557 MCIMETRO ACCESS TRANSMISSION SERVICES LLC GLENBURNIE Landline 238 active
443-558 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ABERDEEN Landline 238 active
443-559 COMCAST IP PHONE, LLC ESSEX VoIP 238 active
443-560 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-561 PAETEC ITEL, LLC ELKRIDGE VoIP 238 active
443-562 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-563 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-564 LEVEL 3 COMMUNICATIONS, LLC - MD TOWSON Landline 238 active
443-565 PAETEC ITEL, LLC RANDALLSTN VoIP 238 active
443-566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD CHESAPKECY Wireless 242 active
443-567 LEVEL 3 COMMUNICATIONS, LLC - MD BEL AIR Landline 238 active
443-568 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ARBUTUS Landline 238 active
443-569 LEVEL 3 COMMUNICATIONS, LLC - MD ANNAPOLIS Landline 238 active
443-570 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-572 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
443-573 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
443-574 PAETEC ITEL, LLC ELLICOTTCY VoIP 238 active
443-575 PAETEC ITEL, LLC ARBUTUS VoIP 238 active
443-576 MCIMETRO ACCESS TRANSMISSION SERVICES LLC RANDALLSTN Landline 238 active
443-577 PAETEC ITEL, LLC GLENBURNIE VoIP 238 active
443-578 XO MARYLAND, LLC COCKEYSVL Landline 238 active
443-579 PAETEC ITEL, LLC ESSEX VoIP 238 active
443-580 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-581 ONVOY, LLC - MD CHASE Landline 238 active
443-582 PAETEC ITEL, LLC CHURCHVL VoIP 238 active
443-583 PAETEC ITEL, LLC COLUMBIA VoIP 238 active
443-584 PAETEC ITEL, LLC CROFTON VoIP 238 active
443-585 PAETEC ITEL, LLC DARLINGTON VoIP 238 active
443-586 CORE COMMUNICATIONS, INC.- MD DUNDALK Landline 238 active
443-587 PAETEC ITEL, LLC EDGEWOOD VoIP 238 active
443-588 MCIMETRO ACCESS TRANSMISSION SERVICES LLC PARKVILLE Landline 238 active
443-589 PAETEC ITEL, LLC COCKEYSVL VoIP 238 active
443-590 LEVEL 3 COMMUNICATIONS, LLC - MD REISTERSTN Landline 238 active
443-591 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD GLENBURNIE Wireless 238 active
443-592 CORE COMMUNICATIONS, INC.- MD ELKRIDGE Landline 238 active
443-593 PAETEC ITEL, LLC ELKTON VoIP 238 active
443-594 LEVEL 3 COMMUNICATIONS, LLC - MD SPARROWSPT Landline 238 active
443-595 BANDWIDTH.COM CLEC, LLC - MD SPARKSGLNC VoIP 238 active
443-596 CORE COMMUNICATIONS, INC.- MD ESSEX Landline 238 active
443-597 METROPCS, INC. SEVERNA PK Wireless 238 active
443-598 BANDWIDTH.COM CLEC, LLC - MD SHERWD FOR VoIP 238 active
443-599 METROPCS, INC. SEVERN Wireless 238 active
443-600 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC ESSEX Wireless 238 active
443-601 PAETEC ITEL, LLC FALLSTON VoIP 238 active
443-602 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-603 PAETEC ITEL, LLC ANNAPOLIS VoIP 238 active
443-604 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-605 PAETEC ITEL, LLC WESTMINSTR VoIP 238 active
443-606 PAETEC ITEL, LLC FORK VoIP 238 active
443-607 PAETEC ITEL, LLC WEST RIVER VoIP 238 active
443-608 NEW CINGULAR WIRELESS PCS, LLC - DC TOWSON Wireless 238 active
443-609 PAETEC ITEL, LLC SYKESVILLE VoIP 238 active
443-610 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-612 VERIZON MARYLAND, INC. CATONSVL Landline 238 active
443-613 NEW CINGULAR WIRELESS PCS, LLC - DC TOWSON Wireless 238 active
443-614 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD SALISBURY Wireless 242 active
443-615 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-616 PAETEC ITEL, LLC BEL AIR VoIP 238 active
443-617 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD FALLSTON Wireless 238 active
443-618 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD GLENBURNIE Wireless 238 active
443-619 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BEL AIR Wireless 238 active
443-620 TELEPORT COMMUNICATIONS AMERICA, LLC - MD WATERLO238 Landline 238 active
443-621 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-622 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-623 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC GLENBURNIE Wireless 238 active
443-624 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD PRINCEFRCK Wireless 238 active
443-625 LEVEL 3 COMMUNICATIONS, LLC - MD FORK Landline 238 active
443-626 PAETEC ITEL, LLC CHASE VoIP 238 active
443-627 LEVEL 3 COMMUNICATIONS, LLC - MD BALTIMORE Landline 238 active
443-628 CORE COMMUNICATIONS, INC.- MD GLENBURNIE Landline 238 active
443-629 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-630 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-631 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
443-632 PAETEC ITEL, LLC TOWSON VoIP 238 active
443-633 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-634 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
443-635 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-636 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC CATONSVL Wireless 238 active
443-637 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ARGRGBSNIS Landline 238 active
443-638 GLOBAL NAPS SOUTH, INC. - MD ELLICOTTCY Landline 238 active
443-639 PAETEC ITEL, LLC HAMPSTEAD VoIP 238 active
443-640 PAETEC ITEL, LLC BEL AIR VoIP 238 active
443-641 LEVEL 3 COMMUNICATIONS, LLC - MD PIKESVILLE Landline 238 active
443-642 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-643 VERIZON MARYLAND, INC. BEL AIR Landline 238 active
443-644 PAETEC ITEL, LLC JARRETTSVL VoIP 238 active
443-645 PAETEC ITEL, LLC MILLERSVL VoIP 238 active
443-646 PAETEC ITEL, LLC NORTHBEACH VoIP 238 active
443-647 PAETEC ITEL, LLC NEWWINDSOR VoIP 238 active
443-648 TELEPORT COMMUNICATIONS AMERICA, LLC - MD ESSEX Landline 238 active
443-649 PAETEC ITEL, LLC SPARROWSPT VoIP 238 active
443-650 MCIMETRO ACCESS TRANSMISSION SERVICES LLC REISTERSTN Landline 238 active
443-651 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-652 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC TOWSON Wireless 238 active
443-653 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC PARKVILLE Wireless 238 active
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443-655 NEW CINGULAR WIRELESS PCS, LLC - DC BEL AIR Wireless 238 active
443-656 PAETEC ITEL, LLC COLUMBIA VoIP 238 active
443-657 LEVEL 3 TELECOM OF MARYLAND, LLC - MD RANDALLSTN Landline 238 active
443-658 ONVOY, LLC - MD WOODLAWN Landline 238 active
443-659 ONVOY, LLC - MD WEST RIVER Landline 238 active
443-660 COMCAST IP PHONE, LLC PIKESVILLE VoIP 238 active
443-661 PAETEC ITEL, LLC WATERLO238 VoIP 238 active
443-662 PAETEC ITEL, LLC SPARKSGLNC VoIP 238 active
443-663 VERIZON MARYLAND, INC. WOODLAWN Landline 238 active
443-664 PAETEC ITEL, LLC OCEAN CITY VoIP 242 active
443-665 CORE COMMUNICATIONS, INC.- MD NANTICOKE Landline 242 active
443-666 LEVEL 3 COMMUNICATIONS, LLC - MD CHESTERTN Landline 242 active
443-667 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD DELMAR Wireless 242 active
443-668 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
443-669 PAETEC ITEL, LLC DELMAR VoIP 242 active
443-670 PAETEC ITEL, LLC CATONSVL VoIP 238 active
443-671 TELEPORT COMMUNICATIONS AMERICA, LLC - MD NEWWINDSOR Landline 238 active
443-672 TELEPORT COMMUNICATIONS AMERICA, LLC - MD PARKTON Landline 238 active
443-673 PAETEC ITEL, LLC BRYNPKLNCM VoIP 238 active
443-674 TELEPORT COMMUNICATIONS AMERICA, LLC - MD NORTH EAST Landline 238 active
443-675 PAETEC ITEL, LLC RANDALLSTN VoIP 238 active
443-676 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-677 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-678 VERIZON MARYLAND, INC. PARKVILLE Landline 238 active
443-679 TELEPORT COMMUNICATIONS AMERICA, LLC - MD SEVERN Landline 238 active
443-680 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-681 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-682 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-683 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-684 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD PRINCEFRCK Wireless 238 active
443-685 PAETEC ITEL, LLC SEVERN VoIP 238 active
443-686 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD FALLSTON Wireless 238 active
443-687 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-688 PAETEC ITEL, LLC SEVERN VoIP 238 active
443-689 PAETEC ITEL, LLC COCKEYSVL VoIP 238 active
443-690 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-691 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-692 MCIMETRO ACCESS TRANSMISSION SERVICES LLC BALTIMORE Landline 238 active
443-693 TELEPORT COMMUNICATIONS AMERICA, LLC - MD PERRYVILLE Landline 238 active
443-694 METROPCS, INC. SEVERNA PK Wireless 238 active
443-695 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-696 PAETEC ITEL, LLC DUNDALK VoIP 238 active
443-697 GLOBAL NAPS SOUTH, INC. - MD CATONSVL Landline 238 active
443-698 TELEPORT COMMUNICATIONS AMERICA, LLC - MD ODENTON Landline 238 active
443-699 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
443-701 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ARBUTUS Landline 238 active
443-702 PAETEC ITEL, LLC ARGRGBSNIS VoIP 238 active
443-703 MCIMETRO ACCESS TRANSMISSION SERVICES LLC BALTIMORE Landline 238 active
443-704 PAETEC ITEL, LLC ODENTON VoIP 238 active
443-705 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD COCKEYSVL Wireless 238 active
443-706 PAETEC ITEL, LLC CRISFIELD VoIP 242 active
443-707 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC ABERDEEN Wireless 238 active
443-708 LEVEL 3 TELECOM OF MARYLAND, LLC - MD BALTIMORE Landline 238 active
443-709 PAETEC ITEL, LLC ARBUTUS VoIP 238 active
443-710 MCIMETRO ACCESS TRANSMISSION SERVICES LLC CATONSVL Landline 238 active
443-712 PAETEC ITEL, LLC REISTERSTN VoIP 238 active
443-713 PEERLESS NETWORK OF MARYLAND, LLC GLENBURNIE Landline 238 active
443-714 NEW CINGULAR WIRELESS PCS, LLC - DC ANNAPOLIS Wireless 238 active
443-715 PAETEC ITEL, LLC NORTH EAST VoIP 238 active
443-716 PAETEC ITEL, LLC ANNAPOLIS VoIP 238 active
443-717 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-718 PAETEC ITEL, LLC COLUMBIA VoIP 238 active
443-719 PAETEC ITEL, LLC JARRETTSVL VoIP 238 active
443-720 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ABERDEEN Landline 238 active
443-721 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-722 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-723 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-724 PAETEC ITEL, LLC EASTON VoIP 242 active
443-725 PAETEC ITEL, LLC PARKVILLE VoIP 238 active
443-726 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-727 PAETEC ITEL, LLC BISHOPVL VoIP 242 active
443-728 PAETEC ITEL, LLC BERLIN VoIP 242 active
443-729 PAETEC ITEL, LLC WOODLAWN VoIP 238 active
443-730 PAETEC ITEL, LLC ESSEX VoIP 238 active
443-731 TELEPORT COMMUNICATIONS AMERICA, LLC - MD PT DEPOSIT Landline 238 active
443-732 TELEPORT COMMUNICATIONS AMERICA, LLC - MD SILVER RUN Landline 238 active
443-733 TELEPORT COMMUNICATIONS AMERICA, LLC - MD WATERLO238 Landline 238 active
443-734 VERIZON MARYLAND, INC. SEVERN Landline 238 active
443-735 NEW CINGULAR WIRELESS PCS, LLC - DC SALISBURY Wireless 242 active
443-736 NEW CINGULAR WIRELESS PCS, LLC - DC SALISBURY Wireless 242 active
443-737 PAETEC ITEL, LLC WATERLO238 VoIP 238 active
443-738 PAETEC ITEL, LLC PIKESVILLE VoIP 238 active
443-739 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-740 LEVEL 3 COMMUNICATIONS, LLC - MD BALTIMORE Landline 238 active
443-741 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD COLUMBIA Landline 238 active
443-742 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-743 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-744 METROPCS, INC. REISTERSTN Wireless 238 active
443-745 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD COLUMBIA Wireless 238 active
443-746 LEVEL 3 COMMUNICATIONS, LLC - MD EASTON Landline 242 active
443-747 CORE COMMUNICATIONS, INC.- MD PT DEPOSIT Landline 238 active
443-748 PAETEC ITEL, LLC MILLERSVL VoIP 238 active
443-749 PAETEC ITEL, LLC GLENBURNIE VoIP 238 active
443-750 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-751 PAETEC ITEL, LLC WOODLAWN VoIP 238 active
443-752 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BEL AIR Wireless 238 active
443-753 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WATERLO236 Landline 236 active
443-754 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD SALISBURY Wireless 242 active
443-755 VERIZON MARYLAND, INC. WATERLO238 Landline 238 active
443-756 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-757 PAETEC ITEL, LLC ELKRIDGE VoIP 238 active
443-758 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
443-759 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-760 AT&T - LOCAL ABERDEEN Landline 238 active
443-761 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC TOWSON Wireless 238 active
443-762 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-763 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC GLENBURNIE Wireless 238 active
443-764 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC GLENBURNIE Wireless 238 active
443-765 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
443-766 PAETEC ITEL, LLC COLUMBIA VoIP 238 active
443-767 PAETEC ITEL, LLC WORTHINGTN VoIP 238 active
443-768 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-769 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-770 VERIZON MARYLAND, INC. ARGRGBSNIS Landline 238 active
443-771 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD PRINCEFRCK Wireless 238 active
443-772 PAETEC ITEL, LLC ESSEX VoIP 238 active
443-773 MCIMETRO ACCESS TRANSMISSION SERVICES LLC BRYNPKLNCM Landline 238 active
443-774 NEW CINGULAR WIRELESS PCS, LLC - DC COLUMBIA Wireless 238 active
443-775 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
443-776 BANDWIDTH.COM CLEC, LLC - MD ELKRIDGE VoIP 238 active
443-777 VERIZON MARYLAND, INC. ESSEX Landline 238 active
443-778 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
443-779 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ABERDEEN Landline 238 active
443-780 PAETEC ITEL, LLC WOODLAWN VoIP 238 active
443-781 ONVOY, LLC - MD ARGRGBSNIS Landline 238 active
443-782 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ANNAPOLIS Landline 238 active
443-783 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD SALISBURY Wireless 242 active
443-784 TELEPORT COMMUNICATIONS AMERICA, LLC - MD ARGRGBSNIS Landline 238 active
443-785 ONVOY, LLC - MD ARBUTUS Landline 238 active
443-786 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD EASTON Wireless 242 active
443-787 PAETEC ITEL, LLC BEL AIR VoIP 238 active
443-788 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC ABERDEEN Wireless 238 active
443-789 NEW CINGULAR WIRELESS PCS, LLC - DC WESTMINSTR Wireless 238 active
443-790 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC GLENBURNIE Wireless 238 active
443-791 NEW CINGULAR WIRELESS PCS, LLC - DC TOWSON Wireless 238 active
443-792 VERIZON MARYLAND, INC. BRYNPKLNCM Landline 238 active
443-793 MCIMETRO ACCESS TRANSMISSION SERVICES LLC PARKVILLE Landline 238 active
443-794 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-795 MCIMETRO ACCESS TRANSMISSION SERVICES LLC SEVERN Landline 238 active
443-796 MCIMETRO ACCESS TRANSMISSION SERVICES LLC PIKESVILLE Landline 238 active
443-797 MCIMETRO ACCESS TRANSMISSION SERVICES LLC TOWSON Landline 238 active
443-798 LEVEL 3 TELECOM OF MARYLAND, LLC - MD TOWSON Landline 238 active
443-799 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-800 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-801 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-802 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-803 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-804 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-805 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC GLENBURNIE Wireless 238 active
443-806 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-807 METROPCS, INC. FALLSTON Wireless 238 active
443-808 BANDWIDTH.COM CLEC, LLC - MD ANNAPOLIS VoIP 238 active
443-809 LEVEL 3 COMMUNICATIONS, LLC - MD TOWSON Landline 238 active
443-810 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD COLUMBIA Wireless 238 active
443-813 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-815 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ESSEX Landline 238 active
443-816 MCIMETRO ACCESS TRANSMISSION SERVICES LLC SEVERNA PK Landline 238 active
443-817 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ARGRGBSNIS Landline 238 active
443-818 LEVEL 3 COMMUNICATIONS, LLC - MD ARGRGBSNIS Landline 238 active
443-819 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BEL AIR Wireless 238 active
443-820 PAETEC ITEL, LLC ELKRIDGE VoIP 238 active
443-821 METROPCS, INC. WESTMINSTR Wireless 238 active
443-822 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC ANNAPOLIS Wireless 238 active
443-823 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD TOWSON Wireless 238 active
443-824 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC TOWSON Wireless 238 active
443-825 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-826 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-827 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-828 PAETEC ITEL, LLC ELLICOTTCY VoIP 238 active
443-829 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-830 PAETEC ITEL, LLC CATONSVL VoIP 238 active
443-831 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-832 LEVEL 3 COMMUNICATIONS, LLC - MD COLUMBIA Landline 238 active
443-833 PAETEC ITEL, LLC ARBUTUS VoIP 238 active
443-834 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD TOWSON Wireless 238 active
443-835 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-836 MCIMETRO ACCESS TRANSMISSION SERVICES LLC BALTIMORE Landline 238 active
443-837 PAETEC ITEL, LLC ANNAPOLIS VoIP 238 active
443-838 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-839 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-840 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
443-841 VERIZON MARYLAND, INC. TOWSON Landline 238 active
443-842 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-843 VERIZON MARYLAND, INC. HAVREGRACE Landline 238 active
443-844 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-845 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-846 NEW CINGULAR WIRELESS PCS, LLC - DC TOWSON Wireless 238 active
443-847 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD TOWSON Wireless 238 active
443-848 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC GLENBURNIE Wireless 238 active
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443-850 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-851 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC CATONSVL Wireless 238 active
443-852 NEW CINGULAR WIRELESS PCS, LLC - DC ANNAPOLIS Wireless 238 active
443-853 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-854 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-855 PAETEC ITEL, LLC ABERDEEN VoIP 238 active
443-856 CORE COMMUNICATIONS, INC.- MD OCEAN CITY Landline 242 active
443-857 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-858 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-859 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC SALISBURY Wireless 242 active
443-860 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
443-861 VERIZON MARYLAND, INC. ABERDEEN Landline 238 active
443-862 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD TOWSON Wireless 238 active
443-863 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-864 METROPCS, INC. COLUMBIA Wireless 238 active
443-865 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-866 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BEL AIR Wireless 238 active
443-867 PAETEC ITEL, LLC GLENBURNIE VoIP 238 active
443-868 VERIZON MARYLAND, INC. ESSEX Landline 238 active
443-869 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-870 LEVEL 3 TELECOM OF MARYLAND, LLC - MD PIKESVILLE Landline 238 active
443-871 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC ANNAPOLIS Wireless 238 active
443-872 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
443-873 ONVOY, LLC - MD BALTIMORE Landline 238 active
443-874 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
443-875 NEW CINGULAR WIRELESS PCS, LLC - DC ANNAPOLIS Wireless 238 active
443-876 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BEL AIR Wireless 238 active
443-877 LEVEL 3 COMMUNICATIONS, LLC - MD NORTH EAST Landline 238 active
443-878 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD COLUMBIA Wireless 238 active
443-879 VERIZON MARYLAND, INC. DUNDALK Landline 238 active
443-880 TELEPORT COMMUNICATIONS AMERICA, LLC - MD SALISBURY VoIP 242 active
443-881 METROPCS, INC. REISTERSTN Wireless 238 active
443-882 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-883 TELEPORT COMMUNICATIONS AMERICA, LLC - MD GLENBURNIE VoIP 238 active
443-884 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
443-885 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
443-886 TELEPORT COMMUNICATIONS AMERICA, LLC - MD COCKEYSVL Landline 238 active
443-887 PAETEC ITEL, LLC CATONSVL VoIP 238 active
443-888 PAETEC ITEL, LLC PRINCEANNE VoIP 242 active
443-889 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC GLENBURNIE Wireless 238 active
443-890 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-891 MCIMETRO ACCESS TRANSMISSION SERVICES LLC GLENBURNIE Landline 238 active
443-892 BANDWIDTH.COM CLEC, LLC - MD NEWWINDSOR VoIP 238 active
443-893 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WOODLAWN Landline 238 active
443-894 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-895 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD TOWSON Wireless 238 active
443-896 TELEPORT COMMUNICATIONS AMERICA, LLC - MD COLUMBIA VoIP 238 active
443-897 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-898 LEVEL 3 COMMUNICATIONS, LLC - MD PIKESVILLE Landline 238 active
443-899 LEVEL 3 COMMUNICATIONS, LLC - MD WATERLO238 Landline 238 active
443-900 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD TOWSON Wireless 238 active
443-901 PAETEC ITEL, LLC TOWSON VoIP 238 active
443-902 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-903 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BEL AIR Wireless 238 active
443-904 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-905 NEW CINGULAR WIRELESS PCS, LLC - DC ANNAPOLIS Wireless 238 active
443-906 PEERLESS NETWORK OF MARYLAND, LLC SEVERNA PK Landline 238 active
443-907 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ELKTON Wireless 238 active
443-908 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-909 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-910 NEW CINGULAR WIRELESS PCS, LLC - DC BEL AIR Wireless 238 active
443-912 CORE COMMUNICATIONS, INC.- MD TOWSON Landline 238 active
443-913 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-914 TELEPORT COMMUNICATIONS AMERICA, LLC - MD WORTHINGTN Landline 238 active
443-915 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-916 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-917 ONVOY, LLC - MD COLUMBIA Landline 238 active
443-918 TELEPORT COMMUNICATIONS AMERICA, LLC - MD TANEYTOWN Landline 238 active
443-919 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
443-920 TELEPORT COMMUNICATIONS AMERICA, LLC - MD SYKESVILLE Landline 238 active
443-921 PAETEC ITEL, LLC TOWSON VoIP 238 active
443-922 PAETEC ITEL, LLC EDGEWOOD VoIP 238 active
443-923 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
443-924 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
443-925 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-926 LEVEL 3 COMMUNICATIONS, LLC - MD ANNAPOLIS Landline 238 active
443-927 LEVEL 3 COMMUNICATIONS, LLC - MD BALTIMORE Landline 238 active
443-928 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-929 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC PIKESVILLE Wireless 238 active
443-930 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-931 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD BALTIMORE Landline 238 active
443-932 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-933 TELEPORT COMMUNICATIONS AMERICA, LLC - MD COCKEYSVL Landline 238 active
443-934 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-935 NEW CINGULAR WIRELESS PCS, LLC - DC TOWSON Wireless 238 active
443-936 NEW CINGULAR WIRELESS PCS, LLC - DC ELKRIDGE Wireless 238 active
443-937 TELEPORT COMMUNICATIONS AMERICA, LLC - MD UNION BDG Landline 238 active
443-938 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-939 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-940 PAETEC ITEL, LLC PIKESVILLE VoIP 238 active
443-941 NEW CINGULAR WIRELESS PCS, LLC - DC ELKTON Wireless 238 active
443-942 TELEPORT COMMUNICATIONS AMERICA, LLC - MD SEVERNA PK Landline 238 active
443-943 TELEPORT COMMUNICATIONS AMERICA, LLC - MD SPARROWSPT Landline 238 active
443-944 COMCAST IP PHONE, LLC SALISBURY VoIP 242 active
443-945 NEW CINGULAR WIRELESS PCS, LLC - DC ELKTON Wireless 238 active
443-946 CORE COMMUNICATIONS, INC.- MD PARKVILLE Landline 238 active
443-947 PAETEC ITEL, LLC PERRYVILLE VoIP 238 active
443-948 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-949 COMCAST IP PHONE, LLC ANNAPOLIS VoIP 238 active
443-951 LEVEL 3 COMMUNICATIONS, LLC - MD ANNAPOLIS Landline 238 active
443-952 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WESTMINSTR Wireless 238 active
443-953 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD SALISBURY Wireless 242 active
443-954 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
443-955 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-956 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
443-957 AT&T - LOCAL BALTIMORE Landline 238 active
443-960 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD GLENBURNIE Wireless 238 active
443-961 INTRADO COMMUNICATIONS, LLC BALTIMORE Landline 238 active
443-962 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD GLENBURNIE Wireless 238 active
443-963 BANDWIDTH.COM CLEC, LLC - MD BALTIMORE VoIP 238 active
443-964 LEVEL 3 COMMUNICATIONS, LLC - MD NORTHBEACH Landline 238 active
443-965 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-966 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD FALLSTON Wireless 238 active
443-967 VERIZON MARYLAND, INC. NORTH EAST Landline 238 active
443-968 NEW CINGULAR WIRELESS PCS, LLC - DC PRINCEFRCK Wireless 238 active
443-969 PAETEC ITEL, LLC ESSEX VoIP 238 active
443-970 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-971 BANDWIDTH.COM CLEC, LLC - MD TANEYTOWN VoIP 238 active
443-972 PAETEC ITEL, LLC CAMBRIDGE VoIP 242 active
443-973 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ELLICOTTCY Landline 238 active
443-974 TELEPORT COMMUNICATIONS AMERICA, LLC - MD WESTMINSTR Landline 238 active
443-975 NEW CINGULAR WIRELESS PCS, LLC - DC PRINCEFRCK Wireless 238 active
443-977 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-978 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD SALISBURY Wireless 242 active
443-979 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD COLUMBIA Wireless 238 active
443-980 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
443-981 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD FALLSTON Wireless 238 active
443-982 YMAX COMMUNICATIONS CORP. - MD BALTIMORE Landline 238 active
443-983 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
443-984 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
443-985 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC RANDALLSTN Wireless 238 active
443-986 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
443-987 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BEL AIR Wireless 238 active
443-988 LEVEL 3 COMMUNICATIONS, LLC - MD CENTREVL Landline 242 active
443-989 PAETEC ITEL, LLC GLENBURNIE VoIP 238 active
443-990 BANDWIDTH.COM CLEC, LLC - MD BALTIMORE VoIP 238 active
443-991 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD TOWSON Wireless 238 active
443-992 LEVEL 3 COMMUNICATIONS, LLC - MD BALTIMORE Landline 238 active
443-993 METROPCS, INC. ELKTON Wireless 238 active
443-994 NEW CINGULAR WIRELESS PCS, LLC - DC ANNAPOLIS Wireless 238 active
443-995 NEW CINGULAR WIRELESS PCS, LLC - DC ANNAPOLIS Wireless 238 active
443-996 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
443-997 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
443-998 VERIZON MARYLAND, INC. PARKVILLE Landline 238 active

Area code 443 shares its geographic region with the following overlay area codes:

410 667