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.

Washington Zone 3, MD

<< 1 2 3 4 5 6 7 8 9 10 11 12 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-468 7 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-468 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-468 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-472 A BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-475 A BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-476 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-478 A BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-478 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-478 1 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-478 2 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-478 3 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-478 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-478 5 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-478 6 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-478 7 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-478 8 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-478 9 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-481 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-481 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-481 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-481 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-481 3 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-481 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-481 5 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-481 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-481 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-481 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-481 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-485 A TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-485 0 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-485 1 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-485 2 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-485 3 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-485 4 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-485 5 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-485 6 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-485 7 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-485 8 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-485 9 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-491 A WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-491 0   624H ONVOY SPECTRUM, LLC 236      
240-491 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-491 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-491 3   624H ONVOY SPECTRUM, LLC 236      
240-491 4   624H ONVOY SPECTRUM, LLC 236      
240-491 5 WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-491 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-491 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-491 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-491 9 WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-494 A WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-494 0 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-494 1 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-494 2 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-494 3 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-494 4 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-494 5 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-494 6 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-494 7 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-494 8 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-494 9 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-501 A   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-501 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-501 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-501 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-501 3 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-501 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-501 5 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-501 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-501 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-501 8 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-501 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-502 A WASHDCDP8MD  074F BANDWIDTH.COM CLEC, LLC - DC 236   2024-02-19   
240-502 0   876D ONVOY, LLC - MD 236      
240-502 1   876D ONVOY, LLC - MD 236      
240-502 2 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-502 3   876D ONVOY, LLC - MD 236      
240-502 4   876D ONVOY, LLC - MD 236      
240-502 5   876D ONVOY, LLC - MD 236      
240-502 6   876D ONVOY, LLC - MD 236      
240-502 7   876D ONVOY, LLC - MD 236      
240-502 8 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-502 9   490J DISH WIRELESS, LLC 236      
240-504 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-504 0 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-504 1 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-504 2 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-504 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-504 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-504 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-504 6   624H ONVOY SPECTRUM, LLC 236      
240-504 7   624H ONVOY SPECTRUM, LLC 236      
240-504 8   071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-504 9   071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-505 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-531 A WASHDC127MD  073H TELNYX LLC 236      
240-531 0 WASHDC127MD  073H TELNYX LLC 236      
240-531 1 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-531 2 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
240-531 3 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      

<< 1 2 3 4 5 6 7 8 9 10 11 12 >>

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.