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 6, MD

<< 1 2 3 4 5 6 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-443 A VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-443 0 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-09-22   
240-443 1 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-09-22   
240-443 2 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-01-07   
240-443 3 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-01-07   
240-443 4 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-01-07   
240-443 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-09-24   
240-443 6 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-09-24   
240-443 7 WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2021-05-21   
240-443 8 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-09-24   
240-443 9 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-09-24   
240-493 A TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-493 0 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-493 1 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-493 2 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-493 3 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-493 4 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2007-09-20   
240-493 5 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-493 6 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2007-06-29   
240-493 7 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2006-12-29   
240-493 8 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2008-02-13   
240-493 9 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-05-14   
240-557 A BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-557 0 WASHDC127MD  073H TELNYX LLC 236   2017-05-12   
240-557 1 VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-07-13   
240-557 2 VINNVACBDS0  876D ONVOY, LLC - MD 236   2018-01-14   
240-557 3 VINNVACBDS0  876D ONVOY, LLC - MD 236   2018-01-14   
240-557 4   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-06-16   
240-557 5   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-06-16   
240-557 6   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-06-16   
240-557 7 WASHDC126MD  964H BARR TELL USA, INC. 236   2018-05-08   
240-557 8 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-04-30   
240-557 9 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2017-05-11   
240-724 A WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-724 0 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-724 1 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2004-12-13   
240-724 2 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-04-03   
240-724 3 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-724 4 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2003-01-12   
240-724 5 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-724 6 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-04-03   
240-724 7 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-05-05   
240-724 8 VINNVACBDS0  876D ONVOY, LLC - MD 236   2012-10-17   
240-724 9 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-766 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-766 0 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-766 1 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-766 2 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2014-02-14   
240-766 3 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-766 4 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2014-09-14   

<< 1 2 3 4 5 6 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.