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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
301-526 A Washington Zone 3 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-527 A Gaithersburg MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-528 A Gaithersburg MD GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-529 A Washington Zone 10 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-530 A Washington Zone 2 MD BTHSMDWWDS0  9212 VERIZON MARYLAND, INC. 236      
301-531 A Washington Zone 4 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-531 0 Washington Zone 4 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2012-03-25   
301-531 1 Washington Zone 4 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-531 2 Washington Zone 4 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-531 3 Washington Zone 4 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-531 4 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-02-22   
301-531 5 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-02-22   
301-531 6 Washington Zone 4 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-531 7 Washington Zone 4 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-531 8 Washington Zone 4 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-531 9 Washington Zone 4 MD   829J PAETEC ITEL, LLC 236   2003-04-06   
301-532 A Laurel (Baltimore LATA) MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
301-532 0 Laurel (Baltimore LATA) MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-07-09   
301-532 1 Laurel (Baltimore LATA) MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2017-02-21   
301-532 2 Laurel (Baltimore LATA) MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2017-02-21   
301-532 3 Laurel (Baltimore LATA) MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2016-07-14   
301-532 4 Laurel (Baltimore LATA) MD BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238   2016-04-21   
301-532 5 Laurel (Baltimore LATA) MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2017-02-04   
301-532 6 Laurel (Baltimore LATA) MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2016-12-09   
301-532 7 Laurel (Baltimore LATA) MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-11-27   
301-532 8 Laurel (Baltimore LATA) MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-11-27   
301-532 9 Laurel (Baltimore LATA) MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-04-20   
301-533 A Oakland MD OKLDMDOKDS0  9212 VERIZON MARYLAND, INC. 240      
301-533 0 Oakland MD OKLDMDOKDS0  9212 VERIZON MARYLAND, INC. 240      
301-533 1 Oakland MD OKLDMDOKDS0  9212 VERIZON MARYLAND, INC. 240      
301-533 2 Oakland MD OKLDMDOKDS0  9212 VERIZON MARYLAND, INC. 240      
301-533 3 Oakland MD OKLDMDOKDS0  9212 VERIZON MARYLAND, INC. 240      
301-533 4 Oakland MD OKLDMDOKDS0  9212 VERIZON MARYLAND, INC. 240      
301-533 5 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2019-05-02   
301-533 6 Oakland MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2008-01-18   
301-533 7 Oakland MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2008-02-13   
301-533 8 Oakland MD FRDRMDLH7MD  281E YMAX COMMUNICATIONS CORP. - MD 240   2009-03-16   
301-533 9 Oakland MD   145J TERRA NOVA TELECOM INC. 240   2025-12-17   
301-534 A Indian Head MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236      
301-534 0 Indian Head MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2007-01-06   
301-534 1 Indian Head MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2007-01-06   
301-534 2 Indian Head MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2007-01-06   
301-534 3 Indian Head MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2007-01-06   
301-534 4 Indian Head MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2007-01-06   
301-534 5 Indian Head MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2007-01-06   
301-534 6 Indian Head MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2007-01-06   
301-534 7 Indian Head MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2007-01-06   
301-534 8 Indian Head MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2007-01-06   
301-534 9 Indian Head MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2007-01-06   
301-535 A Waldorf MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      

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

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