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 10, MD

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-660 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2016-02-06   
240-660 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2016-02-06   
240-660 9 VINNVACB1MD  361H ATLANTECH ONLINE, INC. - MD 236   2015-12-26   
240-665 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-665 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2017-04-06   
240-665 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2017-04-06   
240-665 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2018-12-07   
240-665 3 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2019-11-08   
240-665 4   515J IP HORIZON LLC 236   2017-07-07   
240-665 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-07-13   
240-665 6   829J PAETEC ITEL, LLC 236   2017-03-12   
240-665 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-05-24   
240-665 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2017-03-11   
240-665 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2017-03-11   
240-672 A WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-672 0 SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2013-05-03   
240-672 1 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2004-06-03   
240-672 2 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2004-06-03   
240-672 3 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2004-09-02   
240-672 4 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-04-24   
240-672 5 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2005-01-02   
240-672 6 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2005-02-03   
240-672 7 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2004-12-02   
240-672 8 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2005-02-03   
240-672 9   515J IP HORIZON LLC 236   2013-09-06   
240-715 A   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-715 0 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-12   
240-715 1 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-12   
240-715 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-02-13   
240-715 3   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-715 4   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-715 5 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-02-13   
240-715 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2024-09-28   
240-715 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-05-06   
240-715 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-07-09   
240-715 9   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-728 A WASHDC125MD  197D VONAGE AMERICA LLC 236      
240-728 0 WASHDC125MD  197D VONAGE AMERICA LLC 236   2020-06-26   
240-728 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-01-01   
240-728 2 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-10-17   
240-728 3 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-01-01   
240-728 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-01-01   
240-728 5 WASHDC125MD  197D VONAGE AMERICA LLC 236   2020-06-26   
240-728 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-01-01   
240-728 7 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-10-17   
240-728 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2020-09-08   
240-728 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2020-09-08   
240-731 A BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-740 A VINNVACB1MD  361H ATLANTECH ONLINE, INC. - MD 236      
240-740 0 VINNVACB1MD  361H ATLANTECH ONLINE, INC. - MD 236   2015-11-01   
240-740 1 VINNVACB1MD  361H ATLANTECH ONLINE, INC. - MD 236   2015-11-01   
240-740 2 VINNVACB1MD  361H ATLANTECH ONLINE, INC. - MD 236   2015-11-01   
240-740 3 VINNVACB1MD  361H ATLANTECH ONLINE, INC. - MD 236   2015-11-01   
240-740 4 VINNVACB1MD  361H ATLANTECH ONLINE, INC. - MD 236   2015-11-01   
240-740 5 VINNVACB1MD  361H ATLANTECH ONLINE, INC. - MD 236   2015-11-01   
240-740 6 VINNVACB1MD  361H ATLANTECH ONLINE, INC. - MD 236   2015-11-01   
240-740 7 VINNVACB1MD  361H ATLANTECH ONLINE, INC. - MD 236   2015-11-01   
240-740 8 VINNVACB1MD  361H ATLANTECH ONLINE, INC. - MD 236   2015-11-01   
240-740 9 VINNVACB1MD  361H ATLANTECH ONLINE, INC. - MD 236   2015-11-01   
240-753 A MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-753 0 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   
240-753 1 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2022-04-26   
240-753 2 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-07-03   
240-753 3 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-07-03   
240-753 4 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-07-03   
240-753 5 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2006-08-10   
240-753 6 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2013-03-09   
240-753 7 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2013-05-11   
240-753 8 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2006-08-10   
240-753 9 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2013-06-01   
240-756 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-756 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-07-08   
240-756 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-07-08   
240-756 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-07-08   
240-756 3 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-07-08   
240-756 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-04-10   
240-756 5 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-04-10   
240-756 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-04-10   
240-756 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-04-10   
240-756 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-04-10   
240-756 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-04-10   
240-773 A RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-777 A RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-778 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-778 0 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-778 1 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-778 2 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-778 3 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-08-07   
240-778 4 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-08-07   
240-778 5 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-08-07   
240-778 6 VINNVACBDS0  876D ONVOY, LLC - MD 236   2008-10-05   
240-778 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-07-17   
240-778 8 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-08-07   
240-778 9 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-08-07   
240-789 A VINNVACB7MD  181J ADVANCED TELECOM SOLUTIONS, LLC 236      
240-789 0 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2022-06-14   
240-789 1 BTVLMD12CMA  5562 METROPCS, INC. 236   2021-10-31   
240-789 2 VINNVACB7MD  181J ADVANCED TELECOM SOLUTIONS, LLC 236   2021-09-24   
240-789 3 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2022-08-04   
240-789 4 VINNVACBDS0  876D ONVOY, LLC - MD 236   2022-04-25   

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

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.