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 14, MD

<< 1 2 3 4 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-486 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-486 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-486 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-486 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-12-17   
240-486 3 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-06-16   
240-486 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-06-16   
240-486 5 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-06-29   
240-486 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-486 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-11-14   
240-486 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-10-10   
240-486 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-544 A TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-544 0 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-544 1 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-544 2 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-544 3 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-544 4 LARLMDCCDS0  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 236   2004-04-06   
240-544 5 TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-544 6 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-05-14   
240-544 7 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-05-14   
240-544 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-02-09   
240-544 9   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
240-548 A CHCHMDBEPS0  2593 CORE COMMUNICATIONS, INC.- MD 236   2024-01-16   
240-548 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-09-30   
240-548 1 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-548 2   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
240-548 3 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-05-14   
240-548 4   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
240-548 5   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
240-548 6   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
240-548 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-12-13   
240-548 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2016-04-30   
240-548 9   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
240-556 A CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-556 0 CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-556 1 CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-556 2 VINNVACBDS0  876D ONVOY, LLC - MD 236   2008-10-05   
240-556 3 BTVLMD12CMA  5562 METROPCS, INC. 236   2015-07-03   
240-556 4 BTVLMD12CMA  5562 METROPCS, INC. 236   2015-09-20   
240-556 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-03-14   
240-556 6 VINNVACBDS0  876D ONVOY, LLC - MD 236   2015-06-27   
240-556 7 VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-03-14   
240-556 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-08-14   
240-556 9 CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-929 A WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-929 0 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-929 1 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-06-11   
240-929 2 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-06-11   
240-929 3 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-929 4 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2015-08-13   
240-929 5 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-929 6 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2014-06-21   
240-929 7 BTVLMD12CMA  5562 METROPCS, INC. 236   2017-01-18   
240-929 8 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-06-11   
240-929 9 WASHDC12OMD  4820 CAVALIER EAST, LLC - MD 236      
240-932 A WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-932 0 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-03   
240-932 1 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-03   
240-932 2 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-03   
240-932 3 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-03   
240-932 4 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-03   
240-932 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2022-10-15   
240-932 6 VINNVACBDS0  876D ONVOY, LLC - MD 236   2022-10-15   
240-932 7 VINNVACBDS0  876D ONVOY, LLC - MD 236   2023-02-20   
240-932 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2022-09-29   
240-932 9 VINNVACBDS0  876D ONVOY, LLC - MD 236   2023-06-17   
240-946 A ARTNVAARXBY  965H FRACTEL, LLC 236      
240-946 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-12-27   
240-946 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-12-27   
240-946 2 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-12-27   
240-946 3 ARTNVAARXBY  965H FRACTEL, LLC 236   2021-12-26   
240-946 4 BTVLMD12CMA  5562 METROPCS, INC. 236   2021-12-27   
240-946 5 WASHDC12KMD  145J TERRA NOVA TELECOM INC. 236   2024-10-07   
240-946 6 WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-02-07   
240-946 7 WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-02-07   
240-946 8 WASHDC127MD  073H TELNYX LLC 236   2022-06-17   
240-946 9 SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2022-03-31   
301-218 A UPMRMDCCDS0  9212 VERIZON MARYLAND, INC. 236      
301-225 A WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 0   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 1   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 2   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 3   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 4   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 5   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 6   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 7   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 8   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 9   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-249 A UPMRMDCCDS0  9212 VERIZON MARYLAND, INC. 236      
301-262 A BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-291 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-291 0   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-291 1 BTVLMD12CMA  5562 METROPCS, INC. 236   2016-11-10   
301-291 2 OCQNVAXAVMD  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2003-07-25   
301-291 3   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-291 4   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-291 5 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2012-08-12   
301-291 6 BTVLMD12CMA  5562 METROPCS, INC. 236   2019-07-20   
301-291 7 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2004-11-21   

<< 1 2 3 4 >>

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.