FREE: MyCallBot Caller ID for Android

Area Codes > 301 > Central Office Codes

Exchange Rate Center State Operating Company
301-302 HAGERSTOWN MD NATIONSLINE, INC.-MD
301-303 WSNG236Z13 MD ARCH WIRELESS HOLDINGS, INC.
301-304 WALKERSVL MD COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD
301-305 FREDERICK MD SPRINT SPECTRUM L.P.
301-306 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-307 WSNG238Z13 MD VERIZON MARYLAND, INC.
301-308 WSNG236Z13 MD ARCH WIRELESS HOLDINGS, INC.
301-309 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-310 LAUREL238 MD VERIZON MARYLAND, INC.
301-311 MD
301-312 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-313 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-314 WSHNGTNZN4 MD PAETEC COMMUNICATIONS, INC. - MD
301-315 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-316 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-317 LAUREL236 MD VERIZON MARYLAND, INC.
301-318 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-319 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-320 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-321 WSNGTNZN11 MD TELCOVE OPERATIONS, INC. - MD
301-322 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-323 LAUREL236 MD XSPEDIUS MANAGEMENT CO SWITCHES SERVICES, LLC - MD
301-324 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-325 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-326 WSHNGTNZN3 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
301-327 WSNG238Z15 MD NATIONSLINE, INC.-MD
301-328 WSHNGTNZN3 MD COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD
301-329 WSNG236Z13 MD ARCH WIRELESS HOLDINGS, INC.
301-330 GAITHERSBG MD VERIZON MARYLAND, INC.
301-331 HAGERSTOWN MD DOBSON CELLULAR SYSTEMS, INC.
301-332 WSHNGTNZN3 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-333 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-334 OAKLAND MD VERIZON MARYLAND, INC.
301-335 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-336 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-337 GAITHERSBG MD MCI WORLDCOM COMMUNICATIONS, INC. - MD
301-338 CUMBERLAND MD IDT AMERICA, CORP. - MD
301-339 WSNGTNZN10 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
301-340 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-341 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-342 LXTNPKGRML MD VERIZON MARYLAND, INC.
301-343 WSHNGTNZN5 MD NEXTEL COMMUNICATIONS, INC.
301-344 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-345 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-346 WSHNGTNZN3 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-347 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-348 WSNGTNZN11 MD MCI WORLDCOM COMMUNICATIONS, INC. - MD
301-349 POOLESVL MD VERIZON MARYLAND, INC.
301-350 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-351 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-352 WSNG236Z14 MD VERIZON MARYLAND, INC.
301-353 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-354 WSNGTNZN10 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-355 GAITHERSBG MD VERIZON MARYLAND, INC.
301-356 LAUREL236 MD VDL, INC. DBA GLOBAL TELECOM BROKERS - MD
301-357 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-358 WSNG236Z15 MD LEVEL 3 COMMUNICATIONS, LLC - MD
301-359 WESTERNPT MD VERIZON MARYLAND, INC.
301-360 FREDERICK MD VERIZON MARYLAND, INC.
301-361 WSHNGTNZN4 MD XSPEDIUS MANAGEMENT CO SWITCHES SERVICES, LLC - MD
301-362 LAUREL236 MD VERIZON MARYLAND, INC.
301-363 DAMASCS240 MD LEVEL 3 COMMUNICATIONS, LLC - MD
301-364 WSHNGTNZN4 MD MCI WORLDCOM COMMUNICATIONS, INC. - MD
301-365 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-366 GAITHERSBG MD NEXTEL COMMUNICATIONS, INC.
301-367 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-368 DAMASCS236 MD VERIZON MARYLAND, INC.
301-369 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-370 GAITHERSBG MD NEXTEL COMMUNICATIONS, INC.
301-371 MIDDLETOWN MD VERIZON MARYLAND, INC.
301-372 WSNGTNZN16 MD VERIZON MARYLAND, INC.
301-373 LEONARDTN MD VERIZON MARYLAND, INC.
301-374 WALDORF MD VERIZON MARYLAND, INC.
301-375 INDIANHEAD MD VERIZON MARYLAND, INC.
301-376 LAUREL236 MD VERIZON MARYLAND, INC.
301-377 LAUREL236 MD COMCAST PHONE OF MARYLAND, INC. - MD
301-378 FREDERICK MD COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD
301-379 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
301-380 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-381 MD
301-382 WSNGTNZN11 MD VERIZON MARYLAND, INC.
301-383 WSNG236Z14 MD COMCAST PHONE OF MARYLAND, INC. - MD
301-384 WSNGTNZN12 MD VERIZON MARYLAND, INC.
301-385 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-386 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-387 OAKLAND MD VERIZON MARYLAND, INC.
301-388 WSNGTNZN12 MD VERIZON MARYLAND, INC.
301-389 WSNG236Z13 MD XSPEDIUS MANAGEMENT CO SWITCHES SERVICES, LLC - MD
301-390 WSNG236Z14 MD VERIZON MARYLAND, INC.
301-391 DAMASCS236 MD VERIZON MARYLAND, INC.
301-392 LA PLATA MD VERIZON MARYLAND, INC.
301-393 HAGERSTOWN MD VERIZON MARYLAND, INC.
301-394 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-395 LAUREL238 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-396 WALDORF MD VERIZON MARYLAND, INC.
301-397 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-398 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-399 WALDORF MD NEXTEL COMMUNICATIONS, INC.
301-401 FREDERICK MD DOBSON CELLULAR SYSTEMS, INC.
301-402 WSHNGTNZN2 MD VERIZON MARYLAND, INC.