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 5, MD

<< 1 2 3 4 5 6 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-677 9   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2019-07-11   
240-691 A   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-691 0 WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2024-12-05   
240-691 1 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2024-10-19   
240-691 2 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2007-05-16   
240-691 3 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2007-05-16   
240-691 4   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-691 5 WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2024-12-05   
240-691 6 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2007-12-14   
240-691 7 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2007-12-14   
240-691 8 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2008-09-15   
240-691 9 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2007-02-15   
240-695 A TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
240-695 0 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2015-09-05   
240-695 1 VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-05-19   
240-695 2 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2009-02-02   
240-695 3 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2009-09-04   
240-695 4 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2010-02-16   
240-695 5 TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
240-695 6 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2011-02-19   
240-695 7 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2011-04-01   
240-695 8 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2011-06-27   
240-695 9 WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2020-04-30   
240-716 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-716 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-10-10   
240-716 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-10-10   
240-716 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-12-13   
240-716 3 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2014-09-21   
240-716 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-12-13   
240-716 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2014-10-24   
240-716 6 VINNVACBDS0  876D ONVOY, LLC - MD 236   2014-10-24   
240-716 7 WASIDCRG7MD  508J CENTURYLINK COMMUNICATIONS, LLC 236   2014-04-02   
240-716 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-01-13   
240-716 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-01-13   
240-719 A WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-719 0 WASHDC127MD  073H TELNYX LLC 236   2017-03-14   
240-719 1 BTVLMD12CMA  5562 METROPCS, INC. 236   2016-12-12   
240-719 2 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2016-07-13   
240-719 3 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2016-12-15   
240-719 4 WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2017-07-05   
240-719 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2018-01-18   
240-719 6 VINNVACBDS0  876D ONVOY, LLC - MD 236   2018-01-18   
240-719 7 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2017-04-14   
240-719 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2016-12-09   
240-719 9 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2016-06-10   
240-721 A STLDMDSLDS0  9212 VERIZON MARYLAND, INC. 236      
240-721 0 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2020-05-11   
240-721 1 STLDMDSLDS0  9212 VERIZON MARYLAND, INC. 236   2020-05-10   
240-721 2 STLDMDSLDS0  9212 VERIZON MARYLAND, INC. 236   2020-05-10   
240-721 3 STLDMDSLDS0  9212 VERIZON MARYLAND, INC. 236   2020-05-10   
240-721 4 STLDMDSLDS0  9212 VERIZON MARYLAND, INC. 236   2020-05-10   
240-721 5 STLDMDSLDS0  9212 VERIZON MARYLAND, INC. 236   2020-05-10   
240-721 6 STLDMDSLDS0  9212 VERIZON MARYLAND, INC. 236   2020-05-10   
240-721 7 SLSPMD913MD  939H COMMIO, LLC 236   2021-09-16   
240-721 8 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2020-05-11   
240-721 9 SLSPMD913MD  939H COMMIO, LLC 236   2021-10-11   
240-765 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-765 0 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-765 1 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-765 2 BTVLMD12CMA  5562 METROPCS, INC. 236   2004-02-17   
240-765 3   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-03-29   
240-765 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-11-11   
240-765 5 BTVLMD12CMA  5562 METROPCS, INC. 236   2004-09-13   
240-765 6 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-765 7 WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2008-10-10   
240-765 8 BTVLMD12CMA  5562 METROPCS, INC. 236   2005-02-20   
240-765 9 BTVLMD12CMA  5562 METROPCS, INC. 236   2005-02-20   
240-767 A   829J PAETEC ITEL, LLC 236   2025-04-02   
240-767 0   829J PAETEC ITEL, LLC 236      
240-767 1   829J PAETEC ITEL, LLC 236      
240-767 2   829J PAETEC ITEL, LLC 236      
240-767 3   829J PAETEC ITEL, LLC 236      
240-767 4 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2008-02-13   
240-767 5   829J PAETEC ITEL, LLC 236      
240-767 6 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2008-02-13   
240-767 7 LARLMDCCDS0  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 236   2004-04-06   
240-767 8 SLSPMD913MD  939H COMMIO, LLC 236   2021-09-16   
240-767 9   829J PAETEC ITEL, LLC 236      
240-788 A MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-788 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-06-23   
240-788 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-08-12   
240-788 2 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-10-28   
240-788 3 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-788 4 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2012-05-12   
240-788 5 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-08-12   
240-788 6 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2008-02-17   
240-788 7 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2008-02-17   
240-788 8 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2023-09-07   
240-788 9 SLSPMD913MD  939H COMMIO, LLC 236   2021-09-04   
240-795 A WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-795 0 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2021-10-15   
240-795 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-10-16   
240-795 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-10-16   
240-795 3 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-10-16   
240-795 4 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-10-16   
240-795 5 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-08-21   
240-795 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-11-04   
240-795 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-10-16   
240-795 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-10-16   
240-795 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-10-16   

<< 1 2 3 4 5 6 >>

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.