Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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North East, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-287 A NRTEMDNERS0  9212 VERIZON MARYLAND, INC. 238      
410-656 A BLTMMDCH47Z  420C ARMSTRONG TELECOMMUNICATIONS, INC. - MD 238      
410-656 0 BLTMMDCH47Z  420C ARMSTRONG TELECOMMUNICATIONS, INC. - MD 238   2008-08-04   
410-656 1 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-06-23   
410-656 2 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-01-09   
410-656 3 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-02-01   
410-656 4 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
410-656 5 PIVLMDPKFMD  9170 BROADVIEW NETWORKS, INC. - MD 238   2009-05-08   
410-656 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
410-656 7 BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2014-01-02   
410-656 8 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-15   
410-656 9 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-256 A BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-256 0 BLTMMDCHFMD  5562 METROPCS, INC. 238   2019-07-14   
443-256 1 BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-256 2 BLTMMDCHFMD  5562 METROPCS, INC. 238   2019-03-31   
443-256 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-06-15   
443-256 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-20   
443-256 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-20   
443-256 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-11-03   
443-256 7 BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS LLC 238   2014-06-25   
443-256 8 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-10-01   
443-256 9 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-11-03   
443-674 A BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-674 0 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-26   
443-674 1 CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238   2004-02-05   
443-674 2 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-10-18   
443-674 3 BLTMMDCHFMD  5562 METROPCS, INC. 238   2019-01-22   
443-674 4   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-674 5 BLTMMD91DS1  2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-674 6 BLTMMDCHFMD  5562 METROPCS, INC. 238   2017-04-04   
443-674 7 BLTMMDCHFMD  5562 METROPCS, INC. 238   2017-08-13   
443-674 8 BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2005-07-25   
443-674 9 BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-715 A BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-715 0 BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-715 2 BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2016-10-19   
443-715 3 BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-715 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-04-29   
443-715 5   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-715 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-04-29   
443-715 7 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-05-16   
443-715 8 BLTMMDCHXMX  506J TWILIO INTERNATIONAL INC 238   2020-12-26   
443-715 9   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-877 A BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-877 0 BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2021-01-28   
443-877 1 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-04   
443-877 2 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-10-16   
443-877 3 BLTMMDCHFMD  5562 METROPCS, INC. 238   2018-10-19   
443-877 4 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      

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Last updated: Wed, 01 Jun 2022 03:09:23 UTC

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