Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

Block: A

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-453 A Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-454 A Gaithersburg MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-455 A Washington Zone 5 MD STNGVA08AMD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-456 A Laurel MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
240-457 A Frederick MD FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-458 A Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-459 A Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-460 A Washington Zone 3 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-461 A Washington Zone 3 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-462 A Washington Zone 3 MD BTVLMD12CMA  6664 SPRINT SPECTRUM, L.P. 236      
240-463 A Washington Zone 3 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-464 A Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-465 A Washington Zone 2 MD WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-466 A Mechanicsville MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-467 A Washington Zone 4 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
240-468 A Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-469 A Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
240-470 A Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-471 A Washington Zone 12 MD WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-472 A Washington Zone 3 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-473 A Washington Zone 13 MD HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-474 A Gaithersburg MD VINNVACB2MD  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236      
240-475 A Washington Zone 3 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-476 A Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-477 A Gaithersburg MD HRNDVACKBMD  5966 LIGHTWAVE COMMUNICATIONS, LLC - MD 236      
240-478 A Washington Zone 3 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-479 A Washington Zone 2 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-480 A Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-481 A Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-482 A Washington Zone 2 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-483 A Washington Zone 2 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
240-484 A Laurel MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-485 A Washington Zone 3 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-486 A Washington Zone 14 MD BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-487 A Washington Zone 4 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-488 A Oakland MD CMLDMDCM2MD  836G SHENTEL COMMUNICATIONS, LLC. - MD 240      
240-489 A Poolesville MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-490 A Middletown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
240-491 A Washington Zone 3 MD WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-492 A Washington Zone 5 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-493 A Washington Zone 6 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-494 A Washington Zone 3 MD WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-495 A Washington Zone 4 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-496 A Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-497 A Washington Zone 2 MD CHCHMDBEDS0  9212 VERIZON MARYLAND, INC. 236      
240-498 A Washington Zone 2 MD BTVLMD12CMA  6664 SPRINT SPECTRUM, L.P. 236      
240-499 A Washington Zone 10 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-500 A Hagerstown MD FRDRMDFRAMD  2589 US LEC OF MARYLAND, INC. 240      
240-501 A Washington Zone 3 MD BTVLMD12CMA  6664 SPRINT SPECTRUM, L.P. 236      
240-502 A Washington Zone 3 MD WASHDCDP8MD  074F BANDWIDTH.COM CLEC, LLC - DC 236   2024-02-19   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >>

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.