Reference Data
Area Code Directory
Area Code 410 — Baltimore, Columbia, Hanover, Maryland

Area Code 410 — Baltimore, Columbia, Hanover, Maryland

Active

Data last updated: March 10, 2026

State
Maryland
Country
US
Timezone
America/New_York
Assigned
April 18, 2001
Exchanges (NXX)
783
Carriers
27
Rate Centers
102
Overlay
Yes — 443, 667

Top Carriers

Carrier OCN NXX Count
VERIZON MARYLAND, INC. 9212 507
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 53
NEW CINGULAR WIRELESS PCS, LLC - DC 4036 51
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 45
SPOK, INC. 6630 28
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 22
TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 15
PAETEC ITEL, LLC 829J 12
LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 11
METROPCS, INC. 5562 6

Rate Centers

EASTON SALISBURY ELLICOTTCY ARBUTUS PIKESVILLE CATONSVL BALTIMORE BERLIN GLENBURNIE ANNAPOLIS OCEAN CITY RISING SUN ELKRIDGE CAMBRIDGE SEVERN OXFORD COCKEYSVL SOLOMONS TOWSON ESSEX REISTERSTN PARKVILLE ARGRGBSNIS NORTHBEACH WESTMINSTR SEVERNA PK WATERLO236 WOODLAWN ABERDEEN CECILTON DUNDALK NORTH EAST COLUMBIA QUEENSTOWN ODENTON BEL AIR CHASE SPARKSGLNC SILVER RUN STILL POND BISHOPVL PARKTON HILLSBORO HAMPSTEAD VIENNA PT DEPOSIT SPARROWSPT ELKTON WINGATE BRYNPKLNCM FORK PRINCEFRCK EDGEWOOD SMITH IS WORTHINGTN SUDLERSVL CROFTON CARDIFF DARLINGTON FALLSTON TRAPPE DENTON GREENSBORO GLENWOOD CENTREVL RANDALLSTN SYKESVILLE CHURCHHILL STEVENSVL PERRYVILLE PRINCEANNE MARION SNOW HILL RIDGELY NEWWINDSOR ROCK HALL GALENA PRESTON JARRETTSVL MILLERSVL CHESTERTN CHURCHVL WEST RIVER STMICHAELS FEDERALSBG WARWICK TANEYTOWN UNION BDG DEALISLAND WATERLO238 WILLARDS SHERWD FOR NANTICOKE SHARPTOWN CHESAPKECY TILGHMAN DELMAR MILLINGTON HAVREGRACE HURLOCK POCOMOKE CRISFIELD

Exchange Listings (NXX)

NPA-NXX Carrier Rate Center Type LATA Status
410-200 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD EASTON Landline 242 active
410-202 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD SALISBURY Wireless 242 active
410-203 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-204 VERIZON MARYLAND, INC. ARBUTUS Landline 238 active
410-205 NEW CINGULAR WIRELESS PCS, LLC - DC PIKESVILLE Wireless 238 active
410-206 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-207 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-208 VERIZON MARYLAND, INC. BERLIN Landline 242 active
410-209 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-210 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD GLENBURNIE Wireless 238 active
410-212 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC ANNAPOLIS Wireless 238 active
410-213 VERIZON MARYLAND, INC. OCEAN CITY Landline 242 active
410-214 CORE COMMUNICATIONS, INC.- MD RISING SUN Landline 238 active
410-215 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-216 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
410-217 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-218 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-219 VERIZON MARYLAND, INC. SALISBURY Landline 242 active
410-220 METROPCS, INC. ELKRIDGE Wireless 238 active
410-221 VERIZON MARYLAND, INC. CAMBRIDGE Landline 242 active
410-222 VERIZON MARYLAND, INC. SEVERN Landline 238 active
410-223 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-224 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
410-225 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-226 VERIZON MARYLAND, INC. OXFORD Landline 242 active
410-227 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-228 VERIZON MARYLAND, INC. CAMBRIDGE Landline 242 active
410-229 VERIZON MARYLAND, INC. COCKEYSVL Landline 238 active
410-230 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-231 NEW CINGULAR WIRELESS PCS, LLC - DC SOLOMONS Wireless 238 active
410-232 SPOK, INC. BALTIMORE Landline 238 active
410-233 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-234 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-235 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-236 NEW CINGULAR WIRELESS PCS, LLC - DC TOWSON Wireless 238 active
410-237 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-238 VERIZON MARYLAND, INC. ESSEX Landline 238 active
410-239 VERIZON MARYLAND, INC. REISTERSTN Landline 238 active
410-240 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-241 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-242 VERIZON MARYLAND, INC. ARBUTUS Landline 238 active
410-243 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-244 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-245 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-246 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD BALTIMORE Landline 238 active
410-247 VERIZON MARYLAND, INC. ARBUTUS Landline 238 active
410-248 VERIZON MARYLAND, INC. PARKVILLE Landline 238 active
410-249 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-250 VERIZON MARYLAND, INC. OCEAN CITY Landline 242 active
410-251 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD SALISBURY Wireless 242 active
410-252 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-253 NEW CINGULAR WIRELESS PCS, LLC - DC EASTON Wireless 242 active
410-254 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-255 VERIZON MARYLAND, INC. ARGRGBSNIS Landline 238 active
410-256 VERIZON MARYLAND, INC. PARKVILLE Landline 238 active
410-257 VERIZON MARYLAND, INC. NORTHBEACH Landline 238 active
410-258 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-259 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WESTMINSTR Wireless 238 active
410-260 VERIZON MARYLAND, INC. SEVERNA PK Landline 238 active
410-261 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-262 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-263 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
410-264 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
410-265 VERIZON MARYLAND, INC. WOODLAWN Landline 238 active
410-266 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
410-267 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
410-268 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
410-269 VERIZON MARYLAND, INC. SEVERNA PK Landline 238 active
410-270 REDI-CALL COMMUNICATIONS CO. SALISBURY Landline 242 active
410-271 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
410-272 VERIZON MARYLAND, INC. ABERDEEN Landline 238 active
410-273 VERIZON MARYLAND, INC. ABERDEEN Landline 238 active
410-274 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-275 VERIZON MARYLAND, INC. CECILTON Landline 242 active
410-276 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-277 VERIZON MARYLAND, INC. WOODLAWN Landline 238 active
410-278 VERIZON MARYLAND, INC. ABERDEEN Landline 238 active
410-279 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
410-280 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
410-281 VERIZON MARYLAND, INC. WOODLAWN Landline 238 active
410-282 VERIZON MARYLAND, INC. DUNDALK Landline 238 active
410-283 SPOK, INC. TOWSON Landline 238 active
410-284 VERIZON MARYLAND, INC. DUNDALK Landline 238 active
410-285 VERIZON MARYLAND, INC. DUNDALK Landline 238 active
410-286 VERIZON MARYLAND, INC. NORTHBEACH Landline 238 active
410-287 VERIZON MARYLAND, INC. NORTH EAST Landline 238 active
410-288 VERIZON MARYLAND, INC. DUNDALK Landline 238 active
410-289 VERIZON MARYLAND, INC. OCEAN CITY Landline 242 active
410-290 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
410-291 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-292 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-293 PAETEC ITEL, LLC ANNAPOLIS VoIP 238 active
410-294 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-295 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
410-296 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-297 VERIZON MARYLAND, INC. ABERDEEN Landline 238 active
410-298 VERIZON MARYLAND, INC. WOODLAWN Landline 238 active
410-299 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-300 METROPCS, INC. ELKRIDGE Wireless 238 active
410-301 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-302 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-303 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-304 IDT AMERICA, CORP. - MD QUEENSTOWN Landline 242 active
410-305 VERIZON MARYLAND, INC. ODENTON Landline 238 active
410-306 VERIZON MARYLAND, INC. ABERDEEN Landline 238 active
410-307 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-308 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-309 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
410-310 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD EASTON Wireless 242 active
410-312 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
410-313 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-314 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD ARBUTUS Landline 238 active
410-315 VERIZON MARYLAND, INC. SEVERNA PK Landline 238 active
410-316 VERIZON MARYLAND, INC. COCKEYSVL Landline 238 active
410-317 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD ARGRGBSNIS Landline 238 active
410-318 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-319 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-320 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC ANNAPOLIS Wireless 238 active
410-321 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-322 NEW CINGULAR WIRELESS PCS, LLC - DC BEL AIR Wireless 238 active
410-323 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-324 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-325 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-326 VERIZON MARYLAND, INC. SOLOMONS Landline 238 active
410-327 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-328 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-329 VERIZON MARYLAND, INC. COCKEYSVL Landline 238 active
410-330 NEW CINGULAR WIRELESS PCS, LLC - DC CAMBRIDGE Wireless 242 active
410-331 SPOK, INC. ELKRIDGE Landline 238 active
410-332 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-333 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-334 VERIZON MARYLAND, INC. SALISBURY Landline 242 active
410-335 VERIZON MARYLAND, INC. CHASE Landline 238 active
410-336 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
410-337 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-338 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-339 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-340 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
410-341 VERIZON MARYLAND, INC. SALISBURY Landline 242 active
410-342 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-343 VERIZON MARYLAND, INC. SPARKSGLNC Landline 238 active
410-344 VERIZON MARYLAND, INC. CHASE Landline 238 active
410-345 VERIZON MARYLAND, INC. PIKESVILLE Landline 238 active
410-346 VERIZON MARYLAND, INC. SILVER RUN Landline 238 active
410-347 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-348 VERIZON MARYLAND, INC. STILL POND Landline 242 active
410-349 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
410-350 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-351 SPOK, INC. BALTIMORE Landline 238 active
410-352 VERIZON MARYLAND, INC. BISHOPVL Landline 242 active
410-353 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
410-354 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-355 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-356 VERIZON MARYLAND, INC. PIKESVILLE Landline 238 active
410-357 VERIZON MARYLAND, INC. PARKTON Landline 238 active
410-358 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-359 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-360 VERIZON MARYLAND, INC. ARGRGBSNIS Landline 238 active
410-361 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-362 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-363 VERIZON MARYLAND, INC. PIKESVILLE Landline 238 active
410-364 VERIZON MARYLAND, INC. HILLSBORO Landline 242 active
410-365 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-366 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-367 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-368 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-369 LEVEL 3 TELECOM OF MARYLAND, LLC - MD BALTIMORE Landline 238 active
410-370 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-371 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-372 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-373 SPOK, INC. TOWSON Landline 238 active
410-374 VERIZON MARYLAND, INC. HAMPSTEAD Landline 238 active
410-375 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-376 VERIZON MARYLAND, INC. VIENNA Landline 242 active
410-377 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-378 VERIZON MARYLAND, INC. PT DEPOSIT Landline 238 active
410-379 VERIZON MARYLAND, INC. ELKRIDGE Landline 238 active
410-380 REDI-CALL COMMUNICATIONS CO. SALISBURY Landline 242 active
410-381 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
410-382 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-383 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-384 VERIZON MARYLAND, INC. SEVERNA PK Landline 238 active
410-385 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-386 VERIZON MARYLAND, INC. WESTMINSTR Landline 238 active
410-387 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
410-388 VERIZON MARYLAND, INC. SPARROWSPT Landline 238 active
410-389 SPOK, INC. BALTIMORE Landline 238 active
410-390 TELEPORT COMMUNICATIONS AMERICA, LLC - MD OCEAN CITY Landline 242 active
410-391 VERIZON MARYLAND, INC. ESSEX Landline 238 active
410-392 VERIZON MARYLAND, INC. ELKTON Landline 238 active
410-393 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-394 VERIZON MARYLAND, INC. SOLOMONS Landline 238 active
410-395 VERIZON MARYLAND, INC. ARBUTUS Landline 238 active
410-396 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-397 VERIZON MARYLAND, INC. WINGATE Landline 242 active
410-398 VERIZON MARYLAND, INC. ELKTON Landline 238 active
410-399 VERIZON MARYLAND, INC. BEL AIR Landline 238 active
410-400 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
410-401 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD BRYNPKLNCM Landline 238 active
410-402 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD CATONSVL Landline 238 active
410-403 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD COCKEYSVL Landline 238 active
410-404 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-405 VERIZON MARYLAND, INC. FORK Landline 238 active
410-406 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD ESSEX Landline 238 active
410-407 VERIZON MARYLAND, INC. ELKRIDGE Landline 238 active
410-408 SPOK, INC. TOWSON Landline 238 active
410-409 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-410 ONVOY SPECTRUM, LLC BALTIMORE Wireless 238 active
410-412 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD GLENBURNIE Landline 238 active
410-413 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD PIKESVILLE Landline 238 active
410-414 VERIZON MARYLAND, INC. PRINCEFRCK Landline 238 active
410-415 VERIZON MARYLAND, INC. PIKESVILLE Landline 238 active
410-416 AMERICAN MESSAGING SERVICES, LLC WATERLO236 Landline 236 active
410-417 VERIZON MARYLAND, INC. EDGEWOOD Landline 238 active
410-418 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-419 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-420 VERIZON MARYLAND, INC. BEL AIR Landline 238 active
410-421 VERIZON MARYLAND, INC. SEVERNA PK Landline 238 active
410-422 NEW CINGULAR WIRELESS PCS, LLC - DC SALISBURY Wireless 242 active
410-423 TELEPORT COMMUNICATIONS AMERICA, LLC - MD COLUMBIA Landline 238 active
410-424 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-425 VERIZON MARYLAND, INC. SMITH IS Landline 242 active
410-426 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-427 TELEPORT COMMUNICATIONS AMERICA, LLC - MD TOWSON Landline 238 active
410-428 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-429 VERIZON MARYLAND, INC. WORTHINGTN Landline 238 active
410-430 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD SALISBURY Wireless 242 active
410-431 VERIZON MARYLAND, INC. SEVERNA PK Landline 238 active
410-432 VERIZON MARYLAND, INC. SEVERNA PK Landline 238 active
410-433 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-434 SPOK, INC. TOWSON Landline 238 active
410-435 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-436 VERIZON MARYLAND, INC. EDGEWOOD Landline 238 active
410-437 VERIZON MARYLAND, INC. ARGRGBSNIS Landline 238 active
410-438 VERIZON MARYLAND, INC. SUDLERSVL Landline 242 active
410-439 VERIZON MARYLAND, INC. ARGRGBSNIS Landline 238 active
410-440 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-441 NEW CINGULAR WIRELESS PCS, LLC - DC ELKTON Wireless 238 active
410-442 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-443 LEVEL 3 COMMUNICATIONS, LLC - MD EASTON Landline 242 active
410-444 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-445 SPOK, INC. BALTIMORE Landline 238 active
410-446 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-447 SPOK, INC. COLUMBIA Landline 238 active
410-448 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-449 BANDWIDTH.COM CLEC, LLC - MD SOLOMONS VoIP 238 active
410-450 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-451 VERIZON MARYLAND, INC. CROFTON Landline 238 active
410-452 VERIZON MARYLAND, INC. CARDIFF Landline 238 active
410-453 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-454 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD BALTIMORE Landline 238 active
410-455 VERIZON MARYLAND, INC. CATONSVL Landline 238 active
410-456 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-457 VERIZON MARYLAND, INC. DARLINGTON Landline 238 active
410-458 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-459 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD FALLSTON Wireless 238 active
410-460 SPOK, INC. ELKRIDGE Landline 238 active
410-461 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-462 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-463 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD TRAPPE Wireless 242 active
410-464 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-465 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-466 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-467 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-468 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-469 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-470 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-471 VERIZON MARYLAND, INC. ELKRIDGE Landline 238 active
410-472 VERIZON MARYLAND, INC. SPARKSGLNC Landline 238 active
410-473 SPOK, INC. TOWSON Landline 238 active
410-474 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD PRINCEFRCK Wireless 238 active
410-475 SPOK, INC. TOWSON Landline 238 active
410-476 VERIZON MARYLAND, INC. TRAPPE Landline 242 active
410-477 VERIZON MARYLAND, INC. SPARROWSPT Landline 238 active
410-478 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
410-479 VERIZON MARYLAND, INC. DENTON Landline 242 active
410-480 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-482 VERIZON MARYLAND, INC. GREENSBORO Landline 242 active
410-483 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-484 VERIZON MARYLAND, INC. PIKESVILLE Landline 238 active
410-485 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-486 VERIZON MARYLAND, INC. PIKESVILLE Landline 238 active
410-487 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD GLENBURNIE Landline 238 active
410-488 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-489 VERIZON MARYLAND, INC. GLENWOOD Landline 238 active
410-490 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD CENTREVL Wireless 242 active
410-491 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-492 SPOK, INC. TOWSON Landline 238 active
410-493 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-494 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-495 VERIZON MARYLAND, INC. PRINCEFRCK Landline 238 active
410-496 VERIZON MARYLAND, INC. RANDALLSTN Landline 238 active
410-497 COMCAST IP PHONE, LLC PARKVILLE VoIP 238 active
410-498 PAETEC ITEL, LLC COCKEYSVL VoIP 238 active
410-499 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-500 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-501 PAETEC ITEL, LLC ARBUTUS VoIP 238 active
410-502 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-503 VERIZON MARYLAND, INC. ELKRIDGE Landline 238 active
410-504 VERIZON MARYLAND, INC. PIKESVILLE Landline 238 active
410-505 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-506 VERIZON MARYLAND, INC. ELKTON Landline 238 active
410-507 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
410-508 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-509 BALTIMORE-WASHINGTON TELEPHONE (BWT) WATERLO236 VoIP 236 active
410-510 TELEPORT COMMUNICATIONS AMERICA, LLC - MD FORK Landline 238 active
410-512 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-513 TELEPORT COMMUNICATIONS AMERICA, LLC - MD PARKVILLE Landline 238 active
410-514 VERIZON MARYLAND, INC. SEVERN Landline 238 active
410-515 VERIZON MARYLAND, INC. FORK Landline 238 active
410-516 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-517 VERIZON MARYLAND, INC. REISTERSTN Landline 238 active
410-518 VERIZON MARYLAND, INC. SEVERNA PK Landline 238 active
410-519 VERIZON MARYLAND, INC. SEVERN Landline 238 active
410-520 VERIZON MARYLAND, INC. OCEAN CITY Landline 242 active
410-521 VERIZON MARYLAND, INC. RANDALLSTN Landline 238 active
410-522 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-523 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-524 VERIZON MARYLAND, INC. OCEAN CITY Landline 242 active
410-525 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-526 VERIZON MARYLAND, INC. REISTERSTN Landline 238 active
410-527 VERIZON MARYLAND, INC. COCKEYSVL Landline 238 active
410-528 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-529 VERIZON MARYLAND, INC. PARKVILLE Landline 238 active
410-530 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
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410-538 VERIZON MARYLAND, INC. FORK Landline 238 active
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410-548 VERIZON MARYLAND, INC. SALISBURY Landline 242 active
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410-550 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-551 VERIZON MARYLAND, INC. SEVERN Landline 238 active
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410-578 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
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410-606 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
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410-614 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
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410-640 SPOK, INC. BALTIMORE Landline 238 active
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410-655 VERIZON MARYLAND, INC. RANDALLSTN Landline 238 active
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410-660 METROPCS, INC. ELKRIDGE Wireless 238 active
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410-665 VERIZON MARYLAND, INC. PARKVILLE Landline 238 active
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410-668 VERIZON MARYLAND, INC. PARKVILLE Landline 238 active
410-669 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-670 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD EDGEWOOD Landline 238 active
410-671 VERIZON MARYLAND, INC. EDGEWOOD Landline 238 active
410-672 VERIZON MARYLAND, INC. ODENTON Landline 238 active
410-673 VERIZON MARYLAND, INC. PRESTON Landline 242 active
410-674 VERIZON MARYLAND, INC. ODENTON Landline 238 active
410-675 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-676 VERIZON MARYLAND, INC. EDGEWOOD Landline 238 active
410-677 VERIZON MARYLAND, INC. SALISBURY Landline 242 active
410-678 SPOK, INC. ELKRIDGE Landline 238 active
410-679 VERIZON MARYLAND, INC. FORK Landline 238 active
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410-681 SPOK, INC. TOWSON Landline 238 active
410-682 VERIZON MARYLAND, INC. ESSEX Landline 238 active
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410-686 VERIZON MARYLAND, INC. ESSEX Landline 238 active
410-687 VERIZON MARYLAND, INC. ESSEX Landline 238 active
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410-691 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-692 VERIZON MARYLAND, INC. JARRETTSVL Landline 238 active
410-693 NEW CINGULAR WIRELESS PCS, LLC - DC ANNAPOLIS Wireless 238 active
410-694 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-695 VERIZON MARYLAND, INC. ODENTON Landline 238 active
410-696 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD ELLICOTTCY Landline 238 active
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410-705 BANDWIDTH.COM CLEC, LLC - MD WATERLO236 VoIP 236 active
410-706 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
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410-708 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD CHESTERTN Wireless 242 active
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410-710 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-712 VERIZON MARYLAND, INC. ELKRIDGE Landline 238 active
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410-714 NEW CINGULAR WIRELESS PCS, LLC - DC EASTON Wireless 242 active
410-715 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
410-716 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-717 LEVEL 3 TELECOM OF MARYLAND, LLC - MD ELKRIDGE Landline 238 active
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410-719 VERIZON MARYLAND, INC. CATONSVL Landline 238 active
410-720 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-721 VERIZON MARYLAND, INC. CROFTON Landline 238 active
410-722 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
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410-724 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
410-725 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC EASTON Wireless 242 active
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410-728 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-729 VERIZON MARYLAND, INC. SEVERN Landline 238 active
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410-732 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-733 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
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410-735 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
410-736 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-737 VERIZON MARYLAND, INC. ARBUTUS Landline 238 active
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410-740 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
410-741 VERIZON MARYLAND, INC. WEST RIVER Landline 238 active
410-742 VERIZON MARYLAND, INC. SALISBURY Landline 242 active
410-743 SPOK, INC. BALTIMORE Landline 238 active
410-744 VERIZON MARYLAND, INC. CATONSVL Landline 238 active
410-745 VERIZON MARYLAND, INC. STMICHAELS Landline 242 active
410-746 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
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410-748 SPOK, INC. ELLICOTTCY Landline 238 active
410-749 VERIZON MARYLAND, INC. SALISBURY Landline 242 active
410-750 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-751 VERIZON MARYLAND, INC. WESTMINSTR Landline 238 active
410-752 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-753 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD PIKESVILLE Landline 238 active
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410-755 VERIZON MARYLAND, INC. WARWICK Landline 242 active
410-756 VERIZON MARYLAND, INC. TANEYTOWN Landline 238 active
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410-758 VERIZON MARYLAND, INC. CENTREVL Landline 242 active
410-759 NEW CINGULAR WIRELESS PCS, LLC - DC BALTIMORE Wireless 238 active
410-760 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-761 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-762 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-763 VERIZON MARYLAND, INC. EASTON Landline 242 active
410-764 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-765 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-766 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-767 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-768 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-769 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-770 VERIZON MARYLAND, INC. EASTON Landline 242 active
410-771 VERIZON MARYLAND, INC. COCKEYSVL Landline 238 active
410-772 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
410-773 VERIZON MARYLAND, INC. COCKEYSVL Landline 238 active
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410-775 VERIZON MARYLAND, INC. UNION BDG Landline 238 active
410-776 TELEPORT COMMUNICATIONS AMERICA, LLC - MD BEL AIR Landline 238 active
410-777 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD SEVERNA PK Landline 238 active
410-778 VERIZON MARYLAND, INC. CHESTERTN Landline 242 active
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410-780 VERIZON MARYLAND, INC. ESSEX Landline 238 active
410-781 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-782 VERIZON MARYLAND, INC. ELKRIDGE Landline 238 active
410-783 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
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410-785 VERIZON MARYLAND, INC. COCKEYSVL Landline 238 active
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410-787 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-788 VERIZON MARYLAND, INC. CATONSVL Landline 238 active
410-789 VERIZON MARYLAND, INC. BRYNPKLNCM Landline 238 active
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410-791 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
410-792 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
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410-803 VERIZON MARYLAND, INC. FORK Landline 238 active
410-804 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
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410-806 SPOK, INC. TOWSON Landline 238 active
410-807 LEVEL 3 TELECOM OF MARYLAND, LLC - MD CATONSVL Landline 238 active
410-808 METROPCS, INC. FALLSTON Wireless 238 active
410-809 PAETEC ITEL, LLC BEL AIR VoIP 238 active
410-810 VERIZON MARYLAND, INC. CHESTERTN Landline 242 active
410-812 NEW CINGULAR WIRELESS PCS, LLC - DC TOWSON Wireless 238 active
410-813 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
410-814 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
410-815 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
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410-817 VERIZON MARYLAND, INC. FORK Landline 238 active
410-818 TELEPORT COMMUNICATIONS AMERICA, LLC - MD CATONSVL Landline 238 active
410-819 VERIZON MARYLAND, INC. EASTON Landline 242 active
410-820 VERIZON MARYLAND, INC. EASTON Landline 242 active
410-821 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-822 VERIZON MARYLAND, INC. EASTON Landline 242 active
410-823 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-824 LEVEL 3 TELECOM OF MARYLAND, LLC - MD WATERLO236 Landline 236 active
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410-826 ONVOY, LLC - MD BALTIMORE Landline 238 active
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410-828 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-829 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD EASTON Wireless 242 active
410-830 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-831 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC SALISBURY Wireless 242 active
410-832 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-833 VERIZON MARYLAND, INC. REISTERSTN Landline 238 active
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410-837 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-838 VERIZON MARYLAND, INC. BEL AIR Landline 238 active
410-839 SPOK, INC. TOWSON Landline 238 active
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410-841 VERIZON MARYLAND, INC. SEVERNA PK Landline 238 active
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410-847 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-848 VERIZON MARYLAND, INC. WESTMINSTR Landline 238 active
410-849 VERIZON MARYLAND, INC. SHERWD FOR Landline 238 active
410-850 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-851 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-852 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-853 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-854 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
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410-862 ONVOY, LLC - MD WATERLO236 Landline 236 active
410-863 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-864 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD BALTIMORE Landline 238 active
410-865 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-866 VERIZON MARYLAND, INC. ESSEX Landline 238 active
410-867 VERIZON MARYLAND, INC. WEST RIVER Landline 238 active
410-868 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-869 VERIZON MARYLAND, INC. CATONSVL Landline 238 active
410-870 COMCAST IP PHONE, LLC PARKVILLE VoIP 238 active
410-871 VERIZON MARYLAND, INC. WESTMINSTR Landline 238 active
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410-873 VERIZON MARYLAND, INC. NANTICOKE Landline 242 active
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410-875 VERIZON MARYLAND, INC. SYKESVILLE Landline 238 active
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410-877 VERIZON MARYLAND, INC. FALLSTON Landline 238 active
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410-880 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
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410-885 VERIZON MARYLAND, INC. CHESAPKECY Landline 242 active
410-886 VERIZON MARYLAND, INC. TILGHMAN Landline 242 active
410-887 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-888 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
410-889 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-890 SPOK, INC. TOWSON Landline 238 active
410-891 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD COCKEYSVL Landline 238 active
410-892 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-893 VERIZON MARYLAND, INC. FORK Landline 238 active
410-894 SPOK, INC. TOWSON Landline 238 active
410-895 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-896 VERIZON MARYLAND, INC. DELMAR Landline 242 active
410-897 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
410-898 VERIZON MARYLAND, INC. WATERLO236 Landline 236 active
410-899 SPOK, INC. TOWSON Landline 238 active
410-900 PAETEC ITEL, LLC BALTIMORE VoIP 238 active
410-901 VERIZON MARYLAND, INC. CAMBRIDGE Landline 242 active
410-902 VERIZON MARYLAND, INC. PIKESVILLE Landline 238 active
410-903 METROPCS, INC. SEVERNA PK Wireless 238 active
410-904 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD WATERLO238 Landline 238 active
410-905 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-906 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-907 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD WOODLAWN Landline 238 active
410-908 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-909 SPOK, INC. ELKRIDGE Landline 238 active
410-910 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD COLUMBIA Landline 238 active
410-912 PAETEC ITEL, LLC SALISBURY VoIP 242 active
410-913 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-914 PAETEC ITEL, LLC CHURCHVL VoIP 238 active
410-915 BALTIMORE-WASHINGTON TELEPHONE (BWT) BALTIMORE VoIP 238 active
410-916 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-917 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-918 VERIZON MARYLAND, INC. ESSEX Landline 238 active
410-919 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD ANNAPOLIS Landline 238 active
410-920 NEW CINGULAR WIRELESS PCS, LLC - DC ELKTON Wireless 238 active
410-921 LEVEL 3 TELECOM OF MARYLAND, LLC - MD SEVERN Landline 238 active
410-922 VERIZON MARYLAND, INC. RANDALLSTN Landline 238 active
410-923 VERIZON MARYLAND, INC. MILLERSVL Landline 238 active
410-924 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD EASTON Wireless 242 active
410-925 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-926 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-927 LEVEL 3 TELECOM OF MARYLAND, LLC - MD ODENTON Landline 238 active
410-928 VERIZON MARYLAND, INC. MILLINGTON Landline 242 active
410-929 BANDWIDTH.COM CLEC, LLC - MD BALTIMORE VoIP 238 active
410-930 REDI-CALL COMMUNICATIONS CO. WATERLO236 Landline 236 active
410-931 VERIZON MARYLAND, INC. PARKVILLE Landline 238 active
410-932 SPOK, INC. ELKRIDGE Landline 238 active
410-933 VERIZON MARYLAND, INC. PARKVILLE Landline 238 active
410-934 NEW CINGULAR WIRELESS PCS, LLC - DC ANNAPOLIS Wireless 238 active
410-935 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-936 COMCAST IP PHONE, LLC SALISBURY VoIP 242 active
410-937 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD FALLSTON Wireless 238 active
410-938 VERIZON MARYLAND, INC. TOWSON Landline 238 active
410-939 VERIZON MARYLAND, INC. HAVREGRACE Landline 238 active
410-940 PAETEC ITEL, LLC ANNAPOLIS VoIP 238 active
410-941 VERIZON MARYLAND, INC. JARRETTSVL Landline 238 active
410-942 VERIZON MARYLAND, INC. HAVREGRACE Landline 238 active
410-943 VERIZON MARYLAND, INC. HURLOCK Landline 242 active
410-944 VERIZON MARYLAND, INC. WOODLAWN Landline 238 active
410-945 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-946 VERIZON MARYLAND, INC. SEVERNA PK Landline 238 active
410-947 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-948 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-949 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD BALTIMORE Landline 238 active
410-951 TELEPORT COMMUNICATIONS AMERICA, LLC - MD BALTIMORE Landline 238 active
410-952 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-953 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
410-955 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-956 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
410-957 VERIZON MARYLAND, INC. POCOMOKE Landline 242 active
410-960 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD BALTIMORE Wireless 238 active
410-961 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-962 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-963 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-964 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
410-965 VERIZON MARYLAND, INC. WOODLAWN Landline 238 active
410-966 VERIZON MARYLAND, INC. WOODLAWN Landline 238 active
410-967 NEW CINGULAR WIRELESS PCS, LLC - DC TOWSON Wireless 238 active
410-968 VERIZON MARYLAND, INC. CRISFIELD Landline 242 active
410-969 VERIZON MARYLAND, INC. SEVERN Landline 238 active
410-970 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD SYKESVILLE Landline 238 active
410-971 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-972 TELEPORT COMMUNICATIONS AMERICA, LLC - MD ANNAPOLIS Landline 238 active
410-973 MCC TELEPHONY OF THE MID-ATLANTIC, LLC - MD BERLIN VoIP 242 active
410-974 VERIZON MARYLAND, INC. SEVERNA PK Landline 238 active
410-975 VERIZON MARYLAND, INC. SEVERNA PK Landline 238 active
410-977 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC BALTIMORE Wireless 238 active
410-978 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-979 NEW CINGULAR WIRELESS PCS, LLC - DC CATONSVL Wireless 238 active
410-980 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
410-981 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-982 QUANTUM TELECOMMUNICATIONS, INC. - MD BALTIMORE Landline 238 active
410-983 VERIZON MARYLAND, INC. FORK Landline 238 active
410-984 METROPCS, INC. SYKESVILLE Wireless 238 active
410-985 BALTIMORE-WASHINGTON TELEPHONE (BWT) WATERLO236 VoIP 236 active
410-986 VERIZON MARYLAND, INC. BALTIMORE Landline 238 active
410-987 VERIZON MARYLAND, INC. SEVERN Landline 238 active
410-988 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-989 VERIZON MARYLAND, INC. FORK Landline 238 active
410-990 VERIZON MARYLAND, INC. ANNAPOLIS Landline 238 active
410-991 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD ANNAPOLIS Wireless 238 active
410-992 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
410-993 VERIZON MARYLAND, INC. GLENBURNIE Landline 238 active
410-994 VERIZON MARYLAND, INC. EDGEWOOD Landline 238 active
410-995 VERIZON MARYLAND, INC. ELLICOTTCY Landline 238 active
410-996 VERIZON MARYLAND, INC. ELKTON Landline 238 active
410-997 VERIZON MARYLAND, INC. COLUMBIA Landline 238 active
410-998 VERIZON MARYLAND, INC. PIKESVILLE Landline 238 active
410-999 BALTIMORE-WASHINGTON TELEPHONE (BWT) GLENBURNIE VoIP 238 active

Area code 410 shares its geographic region with the following overlay area codes:

443 667