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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
301-546 A Washington Zone 4 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-546 0 Washington Zone 4 MD   9212 VERIZON MARYLAND, INC. 236   2014-06-06   
301-546 1 Washington Zone 4 MD   9212 VERIZON MARYLAND, INC. 236   2014-06-06   
301-546 2 Washington Zone 4 MD   9212 VERIZON MARYLAND, INC. 236   2014-06-06   
301-546 3 Washington Zone 4 MD   9212 VERIZON MARYLAND, INC. 236   2014-06-06   
301-546 4 Washington Zone 4 MD   9212 VERIZON MARYLAND, INC. 236   2014-06-06   
301-546 5 Washington Zone 4 MD   9212 VERIZON MARYLAND, INC. 236   2014-06-06   
301-546 6 Washington Zone 4 MD   9212 VERIZON MARYLAND, INC. 236   2014-06-06   
301-546 7 Washington Zone 4 MD   9212 VERIZON MARYLAND, INC. 236   2014-06-06   
301-546 8 Washington Zone 4 MD   9212 VERIZON MARYLAND, INC. 236   2014-06-06   
301-546 9 Washington Zone 4 MD   9212 VERIZON MARYLAND, INC. 236   2014-06-06   
301-547 A Washington Zone 2 MD WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-547 0 Washington Zone 2 MD WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-547 1 Washington Zone 2 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2008-03-11   
301-547 2 Washington Zone 2 MD WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-547 3 Washington Zone 2 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-06-04   
301-547 4 Washington Zone 2 MD WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-547 5 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-01-11   
301-547 6 Washington Zone 2 MD CHCHMDBEX4X  551G NUSO, LLC 236   2016-08-31   
301-547 7 Washington Zone 2 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-12-03   
301-547 8 Washington Zone 2 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2014-02-21   
301-547 9 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-02-08   
301-548 A Washington Zone 10 MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-549 A Ashton MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-549 0 Ashton MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-09-04   
301-549 1 Ashton MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-549 2 Ashton MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2017-12-06   
301-549 3 Ashton MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-549 4 Ashton MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2018-02-05   
301-549 5 Ashton MD   515J IP HORIZON LLC 236   2015-03-21   
301-549 6 Ashton MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2017-12-06   
301-549 7 Ashton MD   829J PAETEC ITEL, LLC 236   2011-11-01   
301-549 8 Ashton MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-09-04   
301-549 9 Ashton MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-09-04   
301-550 A Washington Zone 10 MD BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-550 0 Washington Zone 10 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2022-09-10   
301-550 1 Washington Zone 10 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2022-09-10   
301-550 2 Washington Zone 10 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2022-10-15   
301-550 3 Washington Zone 10 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2022-10-17   
301-550 4 Washington Zone 10 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2022-11-14   
301-550 5 Washington Zone 10 MD BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2022-09-09   
301-550 6 Washington Zone 10 MD BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2022-09-09   
301-550 7 Washington Zone 10 MD BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2022-09-09   
301-550 8 Washington Zone 10 MD BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2022-09-09   
301-550 9 Washington Zone 10 MD BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2022-09-09   
301-551 A Washington Zone 3 MD VINNVACB2MD  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236      
301-552 A Washington Zone 13 MD LNHMMDLNDS0  9212 VERIZON MARYLAND, INC. 236      
301-553 A Waldorf MD SLSPMDSSX6X  6630 SPOK, INC. 236      
301-554 A Washington Zone 2 MD SLSPMDSSX6X  6630 SPOK, INC. 236      
301-556 A Gaithersburg MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      

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

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