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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
301-815 A Frederick MD FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
301-816 A Washington Zone 11 MD RKVLMDMRDS0  9212 VERIZON MARYLAND, INC. 236      
301-817 A Washington Zone 5 MD STLDMDSLDS0  9212 VERIZON MARYLAND, INC. 236      
301-818 A Waldorf MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-819 A Washington Zone 3 MD SLSPMDSSDS0  9212 VERIZON MARYLAND, INC. 236      
301-820 A Gaithersburg MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-820 0 Gaithersburg MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2012-02-23   
301-820 1 Gaithersburg MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2012-02-23   
301-820 2 Gaithersburg MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2010-09-14   
301-820 3 Gaithersburg MD   829J PAETEC ITEL, LLC 236   2011-05-27   
301-820 4 Gaithersburg MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-820 5 Gaithersburg MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2009-11-04   
301-820 6 Gaithersburg MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-820 7 Gaithersburg MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2011-06-17   
301-820 8 Gaithersburg MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2012-02-23   
301-820 9 Gaithersburg MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-01-07   
301-821 A Laurel MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-821 0 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-01-02   
301-821 1 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-01-02   
301-821 2 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-08-07   
301-821 3 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2005-09-20   
301-821 4 Laurel MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-821 5 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2005-09-20   
301-821 6 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-01-02   
301-821 7 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-01-02   
301-821 8 Laurel MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236   2005-11-17   
301-821 9 Laurel MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2021-11-08   
301-822 A Washington Zone 11 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-822 0 Washington Zone 11 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2016-09-01   
301-822 1 Washington Zone 11 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-24   
301-822 2 Washington Zone 11 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-02-09   
301-822 3 Washington Zone 11 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2016-09-01   
301-822 4 Washington Zone 11 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2013-10-03   
301-822 5 Washington Zone 11 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2016-09-01   
301-822 6 Washington Zone 11 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-24   
301-822 7 Washington Zone 11 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2016-09-01   
301-822 8 Washington Zone 11 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2016-09-01   
301-822 9 Washington Zone 11 MD SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
301-823 A Washington Zone 13 MD WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-823 0 Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2025-02-01   
301-823 1 Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2025-02-01   
301-823 2 Washington Zone 13 MD WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2008-10-10   
301-823 3 Washington Zone 13 MD   829J PAETEC ITEL, LLC 236   2012-11-21   
301-823 4 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-06-16   
301-823 5 Washington Zone 13 MD WASHDC125MD  197D VONAGE AMERICA LLC 236   2020-05-20   
301-823 6 Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2025-03-09   
301-823 7 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
301-823 8 Washington Zone 13 MD LARLMDCCDS0  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 236   2004-04-06   
301-823 9 Washington Zone 13 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2021-11-08   
301-824 A Smithsburg MD SMBGMDSMRS0  9212 VERIZON MARYLAND, INC. 240      
301-824 0 Smithsburg MD FRDRMDFRXTX  318J COMCAST IP PHONE, LLC 240   2007-04-07   
301-824 1 Smithsburg MD SMBGMDSMRS0  9212 VERIZON MARYLAND, INC. 240      
301-824 2 Smithsburg MD SMBGMDSMRS0  9212 VERIZON MARYLAND, INC. 240      
301-824 3 Smithsburg MD SMBGMDSMRS0  9212 VERIZON MARYLAND, INC. 240      
301-824 4 Smithsburg MD SMBGMDSMRS0  9212 VERIZON MARYLAND, INC. 240      
301-824 5 Smithsburg MD SMBGMDSMRS0  9212 VERIZON MARYLAND, INC. 240      
301-824 6 Smithsburg MD SMBGMDSMRS0  9212 VERIZON MARYLAND, INC. 240      
301-824 7 Smithsburg MD SMBGMDSMRS0  9212 VERIZON MARYLAND, INC. 240      
301-824 8 Smithsburg MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2004-03-28   
301-824 9 Smithsburg MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2006-08-22   
301-825 A Washington Zone 10 MD WASHDCSWDS8  7421 AT&T - LOCAL 236      
301-825 0 Washington Zone 10 MD WASHDCSWDS8  7421 AT&T - LOCAL 236      
301-825 1 Washington Zone 10 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2013-08-01   
301-825 2 Washington Zone 10 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-09-19   
301-825 3 Washington Zone 10 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-09-19   
301-825 4 Washington Zone 10 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-09-19   
301-825 5 Washington Zone 10 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-12-08   
301-825 6 Washington Zone 10 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-09-19   
301-825 7 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2006-12-27   
301-825 8 Washington Zone 10 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-12-08   
301-825 9 Washington Zone 10 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-12-08   
301-826 A Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-827 A Washington Zone 2 MD BTHSMDRPDS0  9212 VERIZON MARYLAND, INC. 236      
301-828 A Washington Zone 2 MD WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-828 0 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2005-09-29   
301-828 1 Washington Zone 2 MD   829J PAETEC ITEL, LLC 236   2005-11-11   
301-828 2 Washington Zone 2 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-828 3 Washington Zone 2 MD OCQNVAXAVMD  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-828 4 Washington Zone 2 MD CHCHMDBEDS0  9212 VERIZON MARYLAND, INC. 236   2005-04-22   
301-828 5 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-07-27   
301-828 6 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-06-28   
301-828 7 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-04-07   
301-828 8 Washington Zone 2 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2008-03-11   
301-828 9 Washington Zone 2 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-829 A Mount Airy MD MTARMDMARS1  9212 VERIZON MARYLAND, INC. 240      
301-829 0 Mount Airy MD MTARMDMARS1  9212 VERIZON MARYLAND, INC. 240      
301-829 1 Mount Airy MD MTARMDMARS1  9212 VERIZON MARYLAND, INC. 240      
301-829 2 Mount Airy MD MTARMDMARS1  9212 VERIZON MARYLAND, INC. 240      
301-829 3 Mount Airy MD MTARMDMARS1  9212 VERIZON MARYLAND, INC. 240      
301-829 4 Mount Airy MD MTARMDMARS1  9212 VERIZON MARYLAND, INC. 240      
301-829 5 Mount Airy MD MTARMDMARS1  9212 VERIZON MARYLAND, INC. 240      
301-829 6 Mount Airy MD MTARMDMARS1  9212 VERIZON MARYLAND, INC. 240      
301-829 7 Mount Airy MD MTARMDMARS1  9212 VERIZON MARYLAND, INC. 240   2001-11-03   
301-829 8 Mount Airy MD MTARMDMARS1  9212 VERIZON MARYLAND, INC. 240      
301-829 9 Mount Airy MD MTARMDMARS1  9212 VERIZON MARYLAND, INC. 240      
301-830 A Washington Zone 3 MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 236      
301-830 0 Washington Zone 3 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2005-08-01   
301-830 1 Washington Zone 3 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2005-08-01   
301-830 2 Washington Zone 3 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2005-08-01   
301-830 3 Washington Zone 3 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2005-09-01   

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Last updated: Sat, 02 May 2026 12:20:53 UTC

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