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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
301-687 4 Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-687 5 Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-687 6 Frostburg MD FRDRMDFRX7X  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 240      
301-687 7 Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-687 8 Frostburg MD   876D ONVOY, LLC - MD 240   2004-02-15   
301-688 A Washington Zone 13 MD LARLMDDYDS0  9212 VERIZON MARYLAND, INC. 236      
301-689 A Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 0 Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 1 Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 2 Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 3 Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 4 Frostburg MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2004-03-28   
301-689 5 Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 6 Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 7 Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 8 Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 9 Frostburg MD FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-690 A Leonardtown MD CHCHMDBEXCX  228C IDT AMERICA, CORP. - MD 236      
301-690 0 Leonardtown MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-07-02   
301-690 1 Leonardtown MD   515J IP HORIZON LLC 236   2015-03-21   
301-690 2 Leonardtown MD CHCHMDBEXCX  228C IDT AMERICA, CORP. - MD 236   2007-07-14   
301-690 3 Leonardtown MD CHCHMDBE1MD  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-06-20   
301-690 4 Leonardtown MD   515J IP HORIZON LLC 236   2016-05-31   
301-690 5 Leonardtown MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2011-12-21   
301-690 6 Leonardtown MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-08-19   
301-690 7 Leonardtown MD WASIDCRG7MD  508J CENTURYLINK COMMUNICATIONS, LLC 236   2014-06-12   
301-690 8 Leonardtown MD SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2013-05-03   
301-690 9 Leonardtown MD SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2013-05-03   
301-691 A Poolesville MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-691 0 Poolesville MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-691 1 Poolesville MD   829J PAETEC ITEL, LLC 236   2004-02-04   
301-691 2 Poolesville MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2015-10-09   
301-691 3 Poolesville MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2012-10-07   
301-691 4 Poolesville MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2015-06-27   
301-691 5 Poolesville MD SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2013-05-03   
301-691 6 Poolesville MD CHCHMDBE1MD  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-06-20   
301-691 7 Poolesville MD WASIDCRG7MD  508J CENTURYLINK COMMUNICATIONS, LLC 236   2014-06-12   
301-691 8 Poolesville MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2015-02-18   
301-691 9 Poolesville MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-692 A Washington Zone 11 MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-692 0 Washington Zone 11 MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-692 1 Washington Zone 11 MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-692 2 Washington Zone 11 MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-692 3 Washington Zone 11 MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-692 4 Washington Zone 11 MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-692 5 Washington Zone 11 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-24   
301-692 6 Washington Zone 11 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-24   
301-692 7 Washington Zone 11 MD WASIDCRG7MD  508J CENTURYLINK COMMUNICATIONS, LLC 236   2013-10-01   
301-692 8 Washington Zone 11 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-24   
301-692 9 Washington Zone 11 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-24   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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