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NPA: 301 [Rate centres in NPA 301] [Dial plan for NPA 301]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-539 6 La Plata MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2022-08-21   
301-539 7 La Plata MD LPLTMDLADS0  9212 VERIZON MARYLAND, INC. 236   2007-12-11   
301-539 8 La Plata MD   829J PAETEC ITEL, LLC 236   2008-01-23   
301-539 9 La Plata MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   
301-540 A Gaithersburg MD GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-541 A Washington Zone 5 MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-541 0 Washington Zone 5 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2012-08-20   
301-541 1 Washington Zone 5 MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-541 2 Washington Zone 5 MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-541 3 Washington Zone 5 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-02-19   
301-541 4 Washington Zone 5 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2013-06-16   
301-541 5 Washington Zone 5 MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-541 6 Washington Zone 5 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2013-06-16   
301-541 7 Washington Zone 5 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   
301-541 8 Washington Zone 5 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   
301-541 9 Washington Zone 5 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2013-10-11   
301-542 A Waldorf MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-542 0 Waldorf MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-542 1 Waldorf MD   829J PAETEC ITEL, LLC 236   2006-01-20   
301-542 2 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-04-24   
301-542 3 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-06-02   
301-542 4 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-07-03   
301-542 5 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2011-06-27   
301-542 6 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2007-11-15   
301-542 7 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-06-02   
301-542 8 Waldorf MD   829J PAETEC ITEL, LLC 236   2004-03-27   
301-542 9 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-08-07   
301-543 A Laurel MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-543 0 Laurel MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2011-07-22   
301-543 1 Laurel MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-543 2 Laurel MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-543 3 Laurel MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-543 4 Laurel MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-543 5 Laurel MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-543 6 Laurel MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-543 7 Laurel MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2015-11-19   
301-543 8 Laurel MD   829J PAETEC ITEL, LLC 236   2005-04-21   
301-543 9 Laurel MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2015-11-19   
301-544 A Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-545 A Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-545 0 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-545 1 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-545 2 Washington Zone 10 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2017-08-17   
301-545 3 Washington Zone 10 MD WASHDC126MD  964H BARR TELL USA, INC. 236   2018-05-08   
301-545 4 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-545 5 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-545 6 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-545 7 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-545 8 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-545 9 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      

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Last updated: Fri, 10 Jul 2026 02:55:48 UTC

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