Local Calling Guide

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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
301-909 8 Washington Zone 5 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-20   
301-909 9 Washington Zone 5 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-910 A Washington Zone 2 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-912 A Washington Zone 14 (Baltimore LATA) MD ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 0 Washington Zone 14 (Baltimore LATA) MD ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 1 Washington Zone 14 (Baltimore LATA) MD ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 2 Washington Zone 14 (Baltimore LATA) MD ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 3 Washington Zone 14 (Baltimore LATA) MD ODTNMDPORS2  9212 VERIZON MARYLAND, INC. 238      
301-912 4 Washington Zone 14 (Baltimore LATA) MD ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 5 Washington Zone 14 (Baltimore LATA) MD ODTNMDPORS2  9212 VERIZON MARYLAND, INC. 238      
301-912 6 Washington Zone 14 (Baltimore LATA) MD ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 7 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
301-912 8 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
301-912 9 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
301-913 A Washington Zone 2 MD CHCHMDBEDS0  9212 VERIZON MARYLAND, INC. 236      
301-913 0 Washington Zone 2 MD CHCHMDBEDS0  9212 VERIZON MARYLAND, INC. 236      
301-913 1 Washington Zone 2 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2017-11-24   
301-913 2 Washington Zone 2 MD CHCHMDBEDS0  9212 VERIZON MARYLAND, INC. 236      
301-913 3 Washington Zone 2 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2017-11-24   
301-913 4 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2017-11-29   
301-913 5 Washington Zone 2 MD CHCHMDBEDS0  9212 VERIZON MARYLAND, INC. 236      
301-913 6 Washington Zone 2 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2017-11-24   
301-913 7 Washington Zone 2 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2017-11-24   
301-913 8 Washington Zone 2 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2017-11-24   
301-913 9 Washington Zone 2 MD CHCHMDBEDS0  9212 VERIZON MARYLAND, INC. 236      
301-914 A Oakland MD THVLMDTV0MD  676A MOUNTAIN COMMUNICATIONS, LLC DBA PROCOM - MD 240      
301-914 0 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 1 Oakland MD THVLMDTV0MD  676A MOUNTAIN COMMUNICATIONS, LLC DBA PROCOM - MD 240   2013-02-17   
301-914 2 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 3 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 4 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 5 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 6 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 7 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 8 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 9 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-915 A Washington Zone 2 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-915 0 Washington Zone 2 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-915 1 Washington Zone 2 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-915 2 Washington Zone 2 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-915 3 Washington Zone 2 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-915 4 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-06-05   
301-915 5 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-06-05   
301-915 6 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-06-05   
301-915 7 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-06-05   
301-915 8 Washington Zone 2 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-915 9 Washington Zone 2 MD   829J PAETEC ITEL, LLC 236   2004-03-27   
301-916 A Gaithersburg MD GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-917 A Washington Zone 10 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-917 0 Washington Zone 10 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      

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

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