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 11 12 13 14 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-567 8 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2006-08-26   
240-567 9 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2006-08-26   
240-599 A MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-599 0 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-599 1 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-599 2 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-599 3 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-599 4 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-599 5 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2014-05-30   
240-599 6 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2005-06-02   
240-599 7 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-599 8 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-599 9 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-614 A BTVLMD127MD  5562 METRO PCS, INC. 236      
240-614 0 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2013-09-24   
240-614 1 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2013-09-24   
240-614 2 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2014-06-11   
240-614 3 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2013-11-22   
240-614 4 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2014-08-18   
240-614 5 BTVLMD127MD  5562 METRO PCS, INC. 236   2014-09-11   
240-614 6 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2013-12-27   
240-614 7 ARTNVAARXDY  318J COMCAST IP PHONE LLC 236   2013-11-22   
240-614 8 BTVLMD127MD  5562 METRO PCS, INC. 236   2014-10-15   
240-614 9 BTVLMD127MD  5562 METRO PCS, INC. 236   2013-09-14   
240-618 A WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-618 0 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2014-11-21   
240-618 1 WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2015-01-05   
240-618 2 VINNVACBDS0  876D ONVOY, LLC - MD 236   2014-12-31   
240-618 3 VINNVACBDS0  876D ONVOY, LLC - MD 236   2014-12-31   
240-618 4 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-02-14   
240-618 5 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2016-05-24   
240-618 6 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-02-14   
240-618 7 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-11-24   
240-618 8 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-11-24   
240-618 9 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2017-01-17   
240-620 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-620 0 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-620 1 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2003-08-03   
240-620 2 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2003-07-05   
240-620 3 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2003-08-19   
240-620 4 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2003-11-03   
240-620 5 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2003-11-03   
240-620 6 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2004-02-17   
240-620 7 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2004-04-20   
240-620 8 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2004-06-03   
240-620 9 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2005-06-02   
240-642 A VINNVACB7MD  181J ADVANCED TELECOM SOLUTIONS LLC 236      
240-642 0 VINNVACB7MD  181J ADVANCED TELECOM SOLUTIONS LLC 236   2018-09-16   
240-642 1 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2020-10-31   
240-642 2 WASHDCSWFMD  2593 CORE COMMUNICATIONS, INC. - MD 236   2019-04-29   

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

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.