Reference Data
Area Code Directory
Area Code 301 — Washington, Maryland

Area Code 301 — Washington, Silver Spring, Chevy Chase, Maryland

Active

Data last updated: March 10, 2026

State
Maryland
Country
US
Timezone
America/New_York
Assigned
January 9, 2002
Exchanges (NXX)
784
Carriers
31
Rate Centers
64
Overlay
Yes — 227, 240

Top Carriers

Carrier OCN NXX Count
VERIZON MARYLAND, INC. 9212 463
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 51
NEW CINGULAR WIRELESS PCS, LLC - DC 4036 47
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 40
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 31
TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 31
LEVEL 3 COMMUNICATIONS, LLC - MD 6119 15
METROPCS, INC. 5562 14
COMCAST IP PHONE, LLC 318J 12
BANDWIDTH.COM CLEC, LLC - MD 071F 11

Rate Centers

INDIANHEAD WSNGTNZN10 WSHNGTNZN2 WSHNGTNZN6 WSNG238Z14 WSNG236Z13 GAITHERSBG WSHNGTNZN4 LAUREL236 WSHNGTNZN3 WSNG236Z14 WILLIAMSPT FREDERICK WSNGTNZN11 ASHTON236 WSNGTNZN16 WSNGTNZN12 HIGHFIELD BRANDYWINE BITTINGER NANJEMOY LEONARDTN DAMASCS236 TOMPKINSVL MT SAVAGE WALDORF CUMBERLAND THURMONT HUGHESVL WSHNGTNZN5 MECHANCSVL MYERSVILLE WSNG236Z15 HAGERSTOWN WALKERSVL WSNG238Z13 LAUREL238 WSNG238Z15 ASHTON238 OAKLAND LXTNPKGRML POOLESVL WESTERNPT DAMASCS240 MIDDLETOWN LA PLATA KEEDYSVL EMMITSBURG KITZMILLER LONACONING FLINTSTONE HANCOCK FROSTBURG MOUNT AIRY FRIENDSVL MCCOOLE BUCKEYSTN SMITHSBURG BRUNSWICK CLEAR SPG NEW MARKET RIDGE BALTIMORE GRANTSVL

Exchange Listings (NXX)

NPA-NXX Carrier Rate Center Type LATA Status
301-200 BANDWIDTH.COM CLEC, LLC - MD INDIANHEAD VoIP 236 active
301-201 NEW CINGULAR WIRELESS PCS, LLC - DC WSNGTNZN10 Wireless 236 active
301-202 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-203 VERIZON MARYLAND, INC. WSHNGTNZN6 Landline 236 active
301-204 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-205 VERIZON MARYLAND, INC. WSNG238Z14 Landline 238 active
301-206 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-207 SPOK, INC. WSNG236Z13 Landline 236 active
301-208 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-209 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-210 VERIZON MARYLAND, INC. LAUREL236 Landline 236 active
301-212 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-213 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-214 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-215 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-216 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-217 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-218 VERIZON MARYLAND, INC. WSNG236Z14 Landline 236 active
301-219 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-220 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-221 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-222 PAETEC ITEL, LLC WSHNGTNZN2 VoIP 236 active
301-223 VERIZON MARYLAND, INC. WILLIAMSPT Landline 240 active
301-224 SPOK, INC. WSHNGTNZN2 Landline 236 active
301-225 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSNG236Z14 Landline 236 active
301-226 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-227 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-228 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-229 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-230 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-231 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-232 MCIMETRO ACCESS TRANSMISSION SERVICES LLC ASHTON236 Landline 236 active
301-233 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-234 VERIZON MARYLAND, INC. WSNGTNZN16 Landline 236 active
301-235 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNGTNZN16 Landline 236 active
301-236 VERIZON MARYLAND, INC. WSNGTNZN12 Landline 236 active
301-237 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-238 VERIZON MARYLAND, INC. WSNGTNZN16 Landline 236 active
301-239 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-240 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-241 VERIZON MARYLAND, INC. HIGHFIELD Landline 240 active
301-242 MCIMETRO ACCESS TRANSMISSION SERVICES LLC BRANDYWINE Landline 236 active
301-243 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-244 PAETEC ITEL, LLC WSHNGTNZN3 VoIP 236 active
301-245 VERIZON MARYLAND, INC. BITTINGER Landline 240 active
301-246 VERIZON MARYLAND, INC. NANJEMOY Landline 236 active
301-247 NEW CINGULAR WIRELESS PCS, LLC - DC LEONARDTN Wireless 236 active
301-248 VERIZON MARYLAND, INC. WSHNGTNZN6 Landline 236 active
301-249 VERIZON MARYLAND, INC. WSNG236Z14 Landline 236 active
301-250 MCIMETRO ACCESS TRANSMISSION SERVICES LLC GAITHERSBG Landline 236 active
301-251 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-252 METROPCS, INC. GAITHERSBG Wireless 236 active
301-253 VERIZON MARYLAND, INC. DAMASCS236 Landline 236 active
301-254 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-255 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-256 MCIMETRO ACCESS TRANSMISSION SERVICES LLC LAUREL236 Landline 236 active
301-257 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-258 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-259 VERIZON MARYLAND, INC. TOMPKINSVL Landline 236 active
301-260 VERIZON MARYLAND, INC. ASHTON236 Landline 236 active
301-261 VERIZON MARYLAND, INC. WSNG238Z14 Landline 238 active
301-262 VERIZON MARYLAND, INC. WSNG236Z14 Landline 236 active
301-263 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-264 VERIZON MARYLAND, INC. MT SAVAGE Landline 240 active
301-265 VERIZON MARYLAND, INC. WSHNGTNZN6 Landline 236 active
301-266 NEW CINGULAR WIRELESS PCS, LLC - DC WALDORF Wireless 236 active
301-267 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-268 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD CUMBERLAND Wireless 240 active
301-269 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN2 Landline 236 active
301-270 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-271 VERIZON MARYLAND, INC. THURMONT Landline 240 active
301-272 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN2 Landline 236 active
301-273 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN3 Landline 236 active
301-274 VERIZON MARYLAND, INC. HUGHESVL Landline 236 active
301-275 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-276 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN4 Landline 236 active
301-277 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-278 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN5 Landline 236 active
301-279 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-280 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-281 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN6 Landline 236 active
301-282 VERIZON MARYLAND, INC. WSNGTNZN12 Landline 236 active
301-283 VERIZON MARYLAND, INC. WSHNGTNZN6 Landline 236 active
301-284 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNGTNZN10 Landline 236 active
301-285 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-286 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-287 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNGTNZN11 Landline 236 active
301-288 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNGTNZN12 Landline 236 active
301-289 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNG236Z13 Landline 236 active
301-290 VERIZON MARYLAND, INC. MECHANCSVL Landline 236 active
301-291 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNG236Z14 Landline 236 active
301-292 VERIZON MARYLAND, INC. WSHNGTNZN6 Landline 236 active
301-293 VERIZON MARYLAND, INC. MYERSVILLE Landline 240 active
301-294 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-295 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-296 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNGTNZN10 Landline 236 active
301-297 VERIZON MARYLAND, INC. WSNGTNZN16 Landline 236 active
301-298 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNG236Z15 Landline 236 active
301-299 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-300 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN2 Wireless 236 active
301-301 ONVOY, LLC - MD GAITHERSBG Landline 236 active
301-302 METROPCS, INC. HAGERSTOWN Wireless 240 active
301-303 SPOK, INC. WSNG236Z13 Landline 236 active
301-304 COMCAST IP PHONE, LLC WALKERSVL VoIP 240 active
301-305 METROPCS, INC. FREDERICK Wireless 240 active
301-306 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-307 VERIZON MARYLAND, INC. WSNG238Z13 Landline 238 active
301-308 SPOK, INC. WSNG236Z13 Landline 236 active
301-309 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-310 VERIZON MARYLAND, INC. LAUREL238 Landline 238 active
301-312 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-313 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-314 PAETEC ITEL, LLC WSHNGTNZN4 VoIP 236 active
301-315 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-316 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-317 VERIZON MARYLAND, INC. LAUREL236 Landline 236 active
301-318 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-319 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-320 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-321 ONVOY, LLC - MD WSNGTNZN11 Landline 236 active
301-322 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-323 LEVEL 3 TELECOM OF MARYLAND, LLC - MD LAUREL236 Landline 236 active
301-324 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-325 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-326 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-327 COMCAST IP PHONE, LLC WSNG238Z15 VoIP 238 active
301-328 COMCAST IP PHONE, LLC WSHNGTNZN3 VoIP 236 active
301-329 ONVOY, LLC - MD ASHTON238 Landline 238 active
301-330 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-331 NEW CINGULAR WIRELESS PCS, LLC - DC HAGERSTOWN Wireless 240 active
301-332 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN3 Wireless 236 active
301-333 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-334 VERIZON MARYLAND, INC. OAKLAND Landline 240 active
301-335 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-336 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-337 MCIMETRO ACCESS TRANSMISSION SERVICES LLC GAITHERSBG Landline 236 active
301-338 IDT AMERICA, CORP. - MD CUMBERLAND Landline 240 active
301-339 PAETEC ITEL, LLC WSNGTNZN10 VoIP 236 active
301-340 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-341 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-342 VERIZON MARYLAND, INC. LXTNPKGRML Landline 236 active
301-343 METROPCS, INC. WSHNGTNZN5 Wireless 236 active
301-344 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-345 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-346 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN3 Wireless 236 active
301-347 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-348 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNGTNZN11 Landline 236 active
301-349 VERIZON MARYLAND, INC. POOLESVL Landline 236 active
301-350 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-351 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-352 VERIZON MARYLAND, INC. WSNG236Z14 Landline 236 active
301-353 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-354 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSNGTNZN10 Landline 236 active
301-355 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-356 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD LAUREL236 Landline 236 active
301-357 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-358 LEVEL 3 COMMUNICATIONS, LLC - MD WSNG236Z15 Landline 236 active
301-359 VERIZON MARYLAND, INC. WESTERNPT Landline 240 active
301-360 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-361 LEVEL 3 TELECOM OF MARYLAND, LLC - MD WSHNGTNZN4 Landline 236 active
301-362 VERIZON MARYLAND, INC. LAUREL236 Landline 236 active
301-363 LEVEL 3 COMMUNICATIONS, LLC - MD DAMASCS240 Landline 240 active
301-364 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN4 Landline 236 active
301-365 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-366 METROPCS, INC. GAITHERSBG Wireless 236 active
301-367 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-368 VERIZON MARYLAND, INC. DAMASCS236 Landline 236 active
301-369 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-370 METROPCS, INC. GAITHERSBG Wireless 236 active
301-371 VERIZON MARYLAND, INC. MIDDLETOWN Landline 240 active
301-372 VERIZON MARYLAND, INC. WSNGTNZN16 Landline 236 active
301-373 VERIZON MARYLAND, INC. LEONARDTN Landline 236 active
301-374 VERIZON MARYLAND, INC. WALDORF Landline 236 active
301-375 VERIZON MARYLAND, INC. INDIANHEAD Landline 236 active
301-376 VERIZON MARYLAND, INC. LAUREL236 Landline 236 active
301-377 COMCAST IP PHONE, LLC LAUREL236 VoIP 236 active
301-378 COMCAST IP PHONE, LLC FREDERICK VoIP 240 active
301-379 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-380 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-381 ONVOY, LLC - MD WSHNGTNZN2 Landline 236 active
301-382 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-383 COMCAST IP PHONE, LLC WSNG236Z14 VoIP 236 active
301-384 VERIZON MARYLAND, INC. WSNGTNZN12 Landline 236 active
301-385 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-386 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-387 VERIZON MARYLAND, INC. OAKLAND Landline 240 active
301-388 VERIZON MARYLAND, INC. WSNGTNZN12 Landline 236 active
301-389 LEVEL 3 TELECOM OF MARYLAND, LLC - MD WSNG236Z13 Landline 236 active
301-390 VERIZON MARYLAND, INC. WSNG236Z14 Landline 236 active
301-391 VERIZON MARYLAND, INC. DAMASCS236 Landline 236 active
301-392 VERIZON MARYLAND, INC. LA PLATA Landline 236 active
301-393 VERIZON MARYLAND, INC. HAGERSTOWN Landline 240 active
301-394 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD LAUREL238 Wireless 238 active
301-396 VERIZON MARYLAND, INC. WALDORF Landline 236 active
301-397 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-398 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-399 METROPCS, INC. WALDORF Wireless 236 active
301-400 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-401 NEW CINGULAR WIRELESS PCS, LLC - DC FREDERICK Wireless 240 active
301-402 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-403 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-404 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-405 PAETEC ITEL, LLC WSHNGTNZN4 VoIP 236 active
301-406 SPOK, INC. WSHNGTNZN2 Landline 236 active
301-407 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-408 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-409 ONVOY SPECTRUM, LLC WSHNGTNZN2 Wireless 236 active
301-410 ONVOY SPECTRUM, LLC WSHNGTNZN6 Wireless 236 active
301-412 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-413 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-414 VERIZON MARYLAND, INC. DAMASCS236 Landline 236 active
301-415 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-416 VERIZON MARYLAND, INC. MYERSVILLE Landline 240 active
301-417 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-418 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-419 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-420 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-421 VERIZON MARYLAND, INC. ASHTON236 Landline 236 active
301-422 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-423 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-424 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-425 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-426 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-427 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-428 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-429 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-430 VERIZON MARYLAND, INC. WSNG236Z14 Landline 236 active
301-431 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-432 VERIZON MARYLAND, INC. KEEDYSVL Landline 240 active
301-433 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-434 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-435 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-436 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-437 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-438 VERIZON MARYLAND, INC. WSNGTNZN12 Landline 236 active
301-439 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-440 METROPCS, INC. WSHNGTNZN5 Wireless 236 active
301-441 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-442 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-443 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-444 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-445 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-446 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-447 VERIZON MARYLAND, INC. EMMITSBURG Landline 240 active
301-448 COMCAST IP PHONE, LLC WSHNGTNZN3 VoIP 236 active
301-449 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-450 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN3 Wireless 236 active
301-451 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-452 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-453 VERIZON MARYLAND, INC. KITZMILLER Landline 240 active
301-454 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-455 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-456 COMCAST IP PHONE, LLC WSHNGTNZN5 VoIP 236 active
301-457 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-458 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSHNGTNZN4 Landline 236 active
301-459 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-460 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-461 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSNGTNZN10 Wireless 236 active
301-462 METROPCS, INC. MYERSVILLE Wireless 240 active
301-463 VERIZON MARYLAND, INC. LONACONING Landline 240 active
301-464 VERIZON MARYLAND, INC. WSNG236Z14 Landline 236 active
301-465 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC MYERSVILLE Wireless 240 active
301-466 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-467 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-468 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-469 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-470 VERIZON MARYLAND, INC. WSNG236Z14 Landline 236 active
301-471 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD FREDERICK Wireless 240 active
301-472 VERIZON MARYLAND, INC. MECHANCSVL Landline 236 active
301-473 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-474 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-475 VERIZON MARYLAND, INC. LEONARDTN Landline 236 active
301-476 VERIZON MARYLAND, INC. ASHTON236 Landline 236 active
301-477 COMCAST IP PHONE, LLC WSNG236Z13 VoIP 236 active
301-478 VERIZON MARYLAND, INC. FLINTSTONE Landline 240 active
301-479 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNG236Z13 Landline 236 active
301-480 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-481 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD LEONARDTN Wireless 236 active
301-482 VERIZON MARYLAND, INC. DAMASCS236 Landline 236 active
301-483 VERIZON MARYLAND, INC. LAUREL236 Landline 236 active
301-484 COMCAST IP PHONE, LLC WSHNGTNZN4 VoIP 236 active
301-485 COMCAST IP PHONE, LLC WSHNGTNZN6 VoIP 236 active
301-486 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-487 VERIZON MARYLAND, INC. MYERSVILLE Landline 240 active
301-488 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-489 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-490 VERIZON MARYLAND, INC. LAUREL236 Landline 236 active
301-491 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD HAGERSTOWN Wireless 240 active
301-492 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-493 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-494 VERIZON MARYLAND, INC. WSNG238Z15 Landline 238 active
301-495 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-496 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-497 VERIZON MARYLAND, INC. LAUREL236 Landline 236 active
301-498 VERIZON MARYLAND, INC. LAUREL236 Landline 236 active
301-499 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-500 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN2 Landline 236 active
301-501 NEW CINGULAR WIRELESS PCS, LLC - DC OAKLAND Wireless 240 active
301-502 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-503 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
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301-508 NEW CINGULAR WIRELESS PCS, LLC - DC MYERSVILLE Wireless 240 active
301-509 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-510 SPOK, INC. WSNG236Z13 Landline 236 active
301-512 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-513 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-514 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD FREDERICK Wireless 240 active
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301-517 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-518 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-519 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-520 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
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301-522 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-523 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-524 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC FREDERICK Wireless 240 active
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301-526 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN3 Wireless 236 active
301-527 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-528 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-529 NEW CINGULAR WIRELESS PCS, LLC - DC WSNGTNZN10 Wireless 236 active
301-530 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-531 STARPOWER COMMUNICATIONS, LLC - MD WSHNGTNZN4 Landline 236 active
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301-537 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
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301-540 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
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301-542 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WALDORF Landline 236 active
301-543 TELEPORT COMMUNICATIONS AMERICA, LLC - DC LAUREL236 Landline 236 active
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301-545 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-546 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-547 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSHNGTNZN2 Landline 236 active
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301-549 VERIZON MARYLAND, INC. ASHTON236 Landline 236 active
301-550 NEW CINGULAR WIRELESS PCS, LLC - DC WSNGTNZN10 Wireless 236 active
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301-560 PAETEC ITEL, LLC WSHNGTNZN4 VoIP 236 active
301-561 BALTIMORE-WASHINGTON TELEPHONE (BWT) WSHNGTNZN3 VoIP 236 active
301-562 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
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301-565 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
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301-567 VERIZON MARYLAND, INC. WSHNGTNZN6 Landline 236 active
301-568 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
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301-571 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
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301-573 METROPCS, INC. HAGERSTOWN Wireless 240 active
301-574 VERIZON MARYLAND, INC. WSNG236Z15 Landline 236 active
301-575 PAETEC ITEL, LLC LAUREL236 VoIP 236 active
301-576 PAETEC ITEL, LLC WSHNGTNZN3 VoIP 236 active
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301-578 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
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301-580 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
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301-582 VERIZON MARYLAND, INC. HAGERSTOWN Landline 240 active
301-583 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-584 BALTIMORE-WASHINGTON TELEPHONE (BWT) WSNGTNZN12 VoIP 236 active
301-585 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-586 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
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301-595 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
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301-600 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-601 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-602 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
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301-604 VERIZON MARYLAND, INC. LAUREL236 Landline 236 active
301-605 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
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301-608 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-609 VERIZON MARYLAND, INC. WALDORF Landline 236 active
301-610 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
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301-620 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
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301-622 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
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301-625 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
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301-632 VERIZON MARYLAND, INC. WALDORF Landline 236 active
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301-639 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD FREDERICK Wireless 240 active
301-640 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-641 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-642 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
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301-644 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-645 VERIZON MARYLAND, INC. WALDORF Landline 236 active
301-646 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-647 AMERICAN MESSAGING SERVICES, LLC WSNG236Z13 Landline 236 active
301-648 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
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301-650 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-651 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-652 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-653 NEW CINGULAR WIRELESS PCS, LLC - DC WALDORF Wireless 236 active
301-654 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-655 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-656 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-657 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-658 TELEPORT COMMUNICATIONS AMERICA, LLC - DC ASHTON236 Landline 236 active
301-659 NEW CINGULAR WIRELESS PCS, LLC - DC WALDORF Wireless 236 active
301-660 NEW CINGULAR WIRELESS PCS, LLC - DC KEEDYSVL Wireless 240 active
301-661 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-662 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-663 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-664 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-665 VERIZON MARYLAND, INC. HAGERSTOWN Landline 240 active
301-666 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSNG236Z14 Landline 236 active
301-667 NEW CINGULAR WIRELESS PCS, LLC - DC MYERSVILLE Wireless 240 active
301-668 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-669 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-670 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-671 BANDWIDTH.COM CLEC, LLC - MD HAGERSTOWN VoIP 240 active
301-672 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC LXTNPKGRML Wireless 236 active
301-673 NEW CINGULAR WIRELESS PCS, LLC - DC FREDERICK Wireless 240 active
301-674 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN2 Wireless 236 active
301-675 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-676 NEW CINGULAR WIRELESS PCS, LLC - DC FREDERICK Wireless 240 active
301-677 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSNG236Z14 Landline 236 active
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301-679 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSNGTNZN12 Landline 236 active
301-680 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-681 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-682 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-683 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSHNGTNZN4 Landline 236 active
301-684 TELEPORT COMMUNICATIONS AMERICA, LLC - DC INDIANHEAD Landline 236 active
301-685 TELEPORT COMMUNICATIONS AMERICA, LLC - DC DAMASCS236 Landline 236 active
301-686 VERIZON MARYLAND, INC. WSHNGTNZN6 Landline 236 active
301-687 VERIZON MARYLAND, INC. FROSTBURG Landline 240 active
301-688 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-689 VERIZON MARYLAND, INC. FROSTBURG Landline 240 active
301-690 IDT AMERICA, CORP. - MD LEONARDTN Landline 236 active
301-691 TELEPORT COMMUNICATIONS AMERICA, LLC - DC POOLESVL Landline 236 active
301-692 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSNGTNZN11 Landline 236 active
301-693 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC FREDERICK Wireless 240 active
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301-695 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-696 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-697 NEW CINGULAR WIRELESS PCS, LLC - DC CUMBERLAND Wireless 240 active
301-698 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
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301-701 BANDWIDTH.COM CLEC, LLC - MD WSNG236Z13 VoIP 236 active
301-702 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-703 LEVEL 3 COMMUNICATIONS, LLC - MD MOUNT AIRY Landline 240 active
301-704 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-705 VERIZON MARYLAND, INC. WALDORF Landline 236 active
301-706 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-707 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD CUMBERLAND Wireless 240 active
301-708 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD LAUREL238 Wireless 238 active
301-709 CSC WIRELESS, LLC CUMBERLAND Wireless 240 active
301-710 LEVEL 3 COMMUNICATIONS, LLC - MD WALDORF Landline 236 active
301-712 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD FREDERICK Landline 240 active
301-713 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-714 VERIZON MARYLAND, INC. HAGERSTOWN Landline 240 active
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301-716 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-717 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
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301-720 TELEPORT COMMUNICATIONS AMERICA, LLC - DC BRANDYWINE Landline 236 active
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301-725 VERIZON MARYLAND, INC. LAUREL236 Landline 236 active
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301-728 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
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301-740 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
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301-742 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
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301-744 VERIZON MARYLAND, INC. INDIANHEAD Landline 236 active
301-745 VERIZON MARYLAND, INC. HAGERSTOWN Landline 240 active
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301-752 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WALDORF Wireless 236 active
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301-760 LEVEL 3 COMMUNICATIONS, LLC - MD WSHNGTNZN2 Landline 236 active
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301-818 BANDWIDTH.COM CLEC, LLC - MD WALDORF VoIP 236 active
301-819 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-820 TELEPORT COMMUNICATIONS AMERICA, LLC - DC GAITHERSBG Landline 236 active
301-821 TELEPORT COMMUNICATIONS AMERICA, LLC - DC LAUREL236 Landline 236 active
301-822 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNGTNZN11 Landline 236 active
301-823 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSNG236Z13 Landline 236 active
301-824 VERIZON MARYLAND, INC. SMITHSBURG Landline 240 active
301-825 AT&T - LOCAL WSNGTNZN10 Landline 236 active
301-826 VERIZON MARYLAND, INC. LXTNPKGRML Landline 236 active
301-827 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-828 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSHNGTNZN2 Landline 236 active
301-829 VERIZON MARYLAND, INC. MOUNT AIRY Landline 240 active
301-830 TELEPORT COMMUNICATIONS AMERICA, LLC - MD WSHNGTNZN3 Landline 236 active
301-831 VERIZON MARYLAND, INC. DAMASCS240 Landline 240 active
301-832 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSHNGTNZN4 Landline 236 active
301-833 TELEPORT COMMUNICATIONS AMERICA, LLC - DC WSNG236Z14 Landline 236 active
301-834 VERIZON MARYLAND, INC. BRUNSWICK Landline 240 active
301-835 VONAGE AMERICA LLC FREDERICK VoIP 240 active
301-836 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-837 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNG236Z13 Landline 236 active
301-838 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-839 VERIZON MARYLAND, INC. WSHNGTNZN6 Landline 236 active
301-840 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-841 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN2 Landline 236 active
301-842 VERIZON MARYLAND, INC. CLEAR SPG Landline 240 active
301-843 VERIZON MARYLAND, INC. WSHNGTNZN6 Landline 236 active
301-844 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-845 VERIZON MARYLAND, INC. WALKERSVL Landline 240 active
301-846 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-847 VERIZON MARYLAND, INC. WSNGTNZN12 Landline 236 active
301-848 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WALDORF Wireless 236 active
301-849 BANDWIDTH.COM CLEC, LLC - MD OAKLAND VoIP 240 active
301-850 LEVEL 3 COMMUNICATIONS, LLC - MD WSNG236Z14 Landline 236 active
301-851 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-852 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-853 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-854 VERIZON MARYLAND, INC. ASHTON238 Landline 238 active
301-855 VERIZON MARYLAND, INC. WSNG238Z15 Landline 238 active
301-856 VERIZON MARYLAND, INC. WSNGTNZN16 Landline 236 active
301-857 CORE COMMUNICATIONS, INC.- MD CLEAR SPG Landline 240 active
301-858 VERIZON MARYLAND, INC. WSNG238Z14 Landline 238 active
301-859 LEVEL 3 COMMUNICATIONS, LLC - MD OAKLAND Landline 240 active
301-860 VERIZON MARYLAND, INC. WSNG236Z14 Landline 236 active
301-861 LEVEL 3 COMMUNICATIONS, LLC - MD WALDORF Landline 236 active
301-862 VERIZON MARYLAND, INC. LXTNPKGRML Landline 236 active
301-863 VERIZON MARYLAND, INC. LXTNPKGRML Landline 236 active
301-864 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-865 VERIZON MARYLAND, INC. NEW MARKET Landline 240 active
301-866 VERIZON MARYLAND, INC. LXTNPKGRML Landline 236 active
301-867 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNG236Z14 Landline 236 active
301-868 VERIZON MARYLAND, INC. WSNGTNZN16 Landline 236 active
301-869 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-870 VERIZON MARYLAND, INC. WSHNGTNZN6 Landline 236 active
301-871 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-872 VERIZON MARYLAND, INC. RIDGE Landline 236 active
301-873 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-874 VERIZON MARYLAND, INC. BUCKEYSTN Landline 240 active
301-875 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD LAUREL236 Wireless 236 active
301-876 LEVEL 3 COMMUNICATIONS, LLC - MD CUMBERLAND Landline 240 active
301-877 VERIZON MARYLAND, INC. WSNGTNZN16 Landline 236 active
301-878 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD BALTIMORE Landline 238 active
301-879 VERIZON MARYLAND, INC. WSNGTNZN12 Landline 236 active
301-880 LEVEL 3 COMMUNICATIONS, LLC - MD LXTNPKGRML Landline 236 active
301-881 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-882 CORE COMMUNICATIONS, INC.- MD NEW MARKET Landline 240 active
301-883 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-884 VERIZON MARYLAND, INC. MECHANCSVL Landline 236 active
301-885 VERIZON MARYLAND, INC. WALDORF Landline 236 active
301-886 BANDWIDTH.COM CLEC, LLC - MD WSNG236Z13 VoIP 236 active
301-887 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-888 VERIZON MARYLAND, INC. WSNGTNZN16 Landline 236 active
301-889 VERIZON MARYLAND, INC. WSNG238Z14 Landline 238 active
301-890 VERIZON MARYLAND, INC. WSNGTNZN12 Landline 236 active
301-891 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-892 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-893 VERIZON MARYLAND, INC. WSHNGTNZN6 Landline 236 active
301-894 VERIZON MARYLAND, INC. WSHNGTNZN6 Landline 236 active
301-895 VERIZON MARYLAND, INC. GRANTSVL Landline 240 active
301-896 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-897 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-898 VERIZON MARYLAND, INC. FREDERICK Landline 240 active
301-899 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-900 ONVOY, LLC - MD WSHNGTNZN2 Landline 236 active
301-901 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-902 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-903 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-904 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD LEONARDTN Wireless 236 active
301-905 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-906 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-907 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-908 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-909 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN5 Landline 236 active
301-910 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-912 VERIZON MARYLAND, INC. WSNG238Z14 Landline 238 active
301-913 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-914 MOUNTAIN COMMUNICATIONS, LLC DBA PROCOM - MD OAKLAND Landline 240 active
301-915 STARPOWER COMMUNICATIONS, LLC - MD WSHNGTNZN2 Landline 236 active
301-916 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-917 STARPOWER COMMUNICATIONS, LLC - MD WSNGTNZN10 Landline 236 active
301-918 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-919 NEW CINGULAR WIRELESS PCS, LLC - DC WSHNGTNZN2 Wireless 236 active
301-920 STARPOWER COMMUNICATIONS, LLC - MD WSHNGTNZN3 Landline 236 active
301-921 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-922 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-923 BANDWIDTH.COM CLEC, LLC - MD WSNG236Z13 VoIP 236 active
301-924 VERIZON MARYLAND, INC. WSNGTNZN12 Landline 236 active
301-925 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-926 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-927 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-928 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-929 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-930 VERIZON MARYLAND, INC. WSHNGTNZN3 Landline 236 active
301-931 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-932 VERIZON MARYLAND, INC. WALDORF Landline 236 active
301-933 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-934 VERIZON MARYLAND, INC. LA PLATA Landline 236 active
301-935 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-936 TELNYX LLC HAGERSTOWN VoIP 240 active
301-937 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-938 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-939 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-940 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-941 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-942 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-943 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-944 MCIMETRO ACCESS TRANSMISSION SERVICES LLC GAITHERSBG Landline 236 active
301-945 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNGTNZN11 Landline 236 active
301-946 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-947 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-948 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-949 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-951 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-952 VERIZON MARYLAND, INC. WSNG236Z15 Landline 236 active
301-953 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-955 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN4 Landline 236 active
301-956 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-957 MCIMETRO ACCESS TRANSMISSION SERVICES LLC LAUREL236 Landline 236 active
301-960 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN3 Landline 236 active
301-961 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-962 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-963 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-964 NEW CINGULAR WIRELESS PCS, LLC - DC MYERSVILLE Wireless 240 active
301-965 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN6 Landline 236 active
301-966 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSNGTNZN12 Landline 236 active
301-967 VERIZON MARYLAND, INC. WSHNGTNZN5 Landline 236 active
301-968 MCIMETRO ACCESS TRANSMISSION SERVICES LLC WSHNGTNZN2 Landline 236 active
301-969 COMCAST IP PHONE, LLC BRUNSWICK VoIP 240 active
301-970 VERIZON MARYLAND, INC. WSNG238Z14 Landline 238 active
301-971 STARPOWER COMMUNICATIONS, LLC - MD WSHNGTNZN6 Landline 236 active
301-972 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-973 BANDWIDTH.COM CLEC, LLC - MD WSNG238Z14 VoIP 238 active
301-974 STARPOWER COMMUNICATIONS, LLC - MD LAUREL236 Landline 236 active
301-975 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-977 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-978 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-979 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSNGTNZN10 Wireless 236 active
301-980 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD WSHNGTNZN3 Wireless 236 active
301-981 LEVEL 3 TELECOM OF MARYLAND, LLC - MD WSHNGTNZN5 Landline 236 active
301-982 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-983 VERIZON MARYLAND, INC. WSNGTNZN10 Landline 236 active
301-984 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active
301-985 VERIZON MARYLAND, INC. WSHNGTNZN4 Landline 236 active
301-986 VERIZON MARYLAND, INC. WSHNGTNZN2 Landline 236 active
301-987 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-988 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD HAGERSTOWN Wireless 240 active
301-989 VERIZON MARYLAND, INC. WSNGTNZN12 Landline 236 active
301-990 VERIZON MARYLAND, INC. GAITHERSBG Landline 236 active
301-991 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC HAGERSTOWN Wireless 240 active
301-992 METROPCS, INC. HAGERSTOWN Wireless 240 active
301-993 VERIZON MARYLAND, INC. WSNG236Z13 Landline 236 active
301-994 VERIZON MARYLAND, INC. LXTNPKGRML Landline 236 active
301-995 VERIZON MARYLAND, INC. LXTNPKGRML Landline 236 active
301-996 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC WSHNGTNZN3 Wireless 236 active
301-997 VERIZON MARYLAND, INC. LEONARDTN Landline 236 active
301-998 VERIZON MARYLAND, INC. WSNGTNZN11 Landline 236 active

Area code 301 shares its geographic region with the following overlay area codes:

227 240