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 4, MD

<< 1 2 3 4 5 6 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-539 4 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2020-09-21   
240-539 5 SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2020-09-05   
240-539 6 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2020-09-21   
240-539 7 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2021-06-03   
240-539 8 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2021-01-03   
240-539 9 SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-582 A HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
240-582 0 HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
240-582 1 WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2008-10-10   
240-582 2 HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
240-582 3 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-04-29   
240-582 4 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2007-09-13   
240-582 5 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2012-10-07   
240-582 6 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2006-10-06   
240-582 7 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2006-10-06   
240-582 8 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2007-03-26   
240-582 9 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2007-03-26   
240-610 A CHCHMDBEPS0  2593 CORE COMMUNICATIONS, INC.- MD 236   2024-01-16   
240-610 0   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-08-02   
240-610 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-05-24   
240-610 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-05-24   
240-610 3 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2019-01-19   
240-610 4 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2019-09-24   
240-610 5 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2019-09-24   
240-610 6 WASHDC125MD  197D VONAGE AMERICA LLC 236   2020-06-08   
240-610 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2019-11-08   
240-610 8 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2018-12-10   
240-610 9 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2021-09-16   
240-613 A TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-613 0   2589 US LEC OF MARYLAND, INC. 236   2012-05-27   
240-613 1   2589 US LEC OF MARYLAND, INC. 236   2012-05-27   
240-613 2   2589 US LEC OF MARYLAND, INC. 236   2012-05-27   
240-613 3   2589 US LEC OF MARYLAND, INC. 236   2012-05-27   
240-613 4   2589 US LEC OF MARYLAND, INC. 236   2012-05-27   
240-613 5   2589 US LEC OF MARYLAND, INC. 236   2012-05-27   
240-613 6   2589 US LEC OF MARYLAND, INC. 236   2012-05-27   
240-613 7   2589 US LEC OF MARYLAND, INC. 236   2012-05-27   
240-613 8   2589 US LEC OF MARYLAND, INC. 236   2012-05-27   
240-613 9   2589 US LEC OF MARYLAND, INC. 236   2012-05-27   
240-615 A BTVLMD12CMA  5562 METROPCS, INC. 236      
240-615 0 BTVLMD12CMA  5562 METROPCS, INC. 236   2013-07-20   
240-615 1 BTVLMD12CMA  5562 METROPCS, INC. 236   2013-07-20   
240-615 2 BTVLMD12CMA  5562 METROPCS, INC. 236   2013-07-20   
240-615 3 BTVLMD12CMA  5562 METROPCS, INC. 236   2013-07-20   
240-615 4 BTVLMD12CMA  5562 METROPCS, INC. 236   2013-07-20   
240-615 5 BTVLMD12CMA  5562 METROPCS, INC. 236   2013-07-20   
240-615 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2013-10-11   
240-615 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2013-10-11   
240-615 8 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2014-08-25   
240-615 9 BTVLMD12CMA  5562 METROPCS, INC. 236   2013-07-20   
240-623 A WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-623 0 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-02-05   
240-623 1 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-02-05   
240-623 2 VINNVACBDS0  876D ONVOY, LLC - MD 236   2015-05-15   
240-623 3   515J IP HORIZON LLC 236   2016-05-31   
240-623 4 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2015-06-30   
240-623 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2015-07-30   
240-623 6 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2015-11-01   
240-623 7 VINNVACBDS0  876D ONVOY, LLC - MD 236   2015-06-27   
240-623 8 VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-01-04   
240-623 9 VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-01-04   
240-667 A WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-667 0 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-667 1 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2006-07-25   
240-667 2 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2006-07-25   
240-667 3 WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2024-12-05   
240-667 4 WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-667 5 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-667 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2012-11-16   
240-667 7 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2007-07-03   
240-667 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2024-07-16   
240-667 9 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-696 A MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-696 0 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-04-07   
240-696 1 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-04-07   
240-696 2 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2007-04-28   
240-696 3 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2011-02-27   
240-696 4 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-696 5 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2014-04-28   
240-696 6 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-04-03   
240-696 7 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-04-03   
240-696 8 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-04-03   
240-696 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2013-02-11   
240-714 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-714 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-12-24   
240-714 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-12-24   
240-714 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-12-24   
240-714 3 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2015-11-14   
240-714 4 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2015-08-12   
240-714 5 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2016-02-24   
240-714 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-08-14   
240-714 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-08-14   
240-714 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-04-20   
240-714 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-04-20   
240-726 A ARTNVAARXGY  478J NUSO, LLC 236      
240-726 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-07-08   
240-726 1 ARTNVAARXGY  478J NUSO, LLC 236   2020-10-27   
240-726 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-07-08   
240-726 3 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-07-08   
240-726 4 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2021-07-30   

<< 1 2 3 4 5 6 >>

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.