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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
301-397 5 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-397 6 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-397 7 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-397 8 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-397 9 Washington Zone 13 MD   145J TERRA NOVA TELECOM INC. 236   2023-08-06   
301-398 A Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-398 0 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2003-11-09   
301-398 1 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2003-11-09   
301-398 2 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2003-11-09   
301-398 3 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2003-11-09   
301-398 4 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2003-11-09   
301-398 5 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2003-11-09   
301-398 6 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2003-11-09   
301-398 7 Washington Zone 10 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2003-11-09   
301-398 8 Washington Zone 10 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2003-11-09   
301-398 9 Washington Zone 10 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2003-11-09   
301-399 A Waldorf MD BTVLMD12CMA  5562 METROPCS, INC. 236      
301-399 0 Waldorf MD BTVLMD12CMA  5562 METROPCS, INC. 236      
301-399 1 Waldorf MD BTVLMD12CMA  5562 METROPCS, INC. 236      
301-399 2 Waldorf MD BTVLMD12CMA  5562 METROPCS, INC. 236      
301-399 3 Waldorf MD BTVLMD12CMA  5562 METROPCS, INC. 236      
301-399 4 Waldorf MD BTVLMD12CMA  5562 METROPCS, INC. 236      
301-399 5 Waldorf MD BTVLMD12CMA  5562 METROPCS, INC. 236      
301-399 6 Waldorf MD BTVLMD12CMA  5562 METROPCS, INC. 236      
301-399 7 Waldorf MD BTVLMD12CMA  5562 METROPCS, INC. 236      
301-399 8 Waldorf MD BTVLMD12CMA  5562 METROPCS, INC. 236      
301-399 9 Waldorf MD BTVLMD12CMA  5562 METROPCS, INC. 236      
301-400 A Washington Zone 2 MD BTHSMDWWDS0  9212 VERIZON MARYLAND, INC. 236      
301-400 0 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236   2010-06-05   
301-400 1 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236   2010-06-05   
301-400 2 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236   2010-06-05   
301-400 3 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236   2010-06-05   
301-400 4 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236   2010-06-05   
301-400 5 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236   2010-06-05   
301-400 6 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236   2010-06-05   
301-400 7 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236   2010-06-05   
301-400 8 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236   2010-06-05   
301-400 9 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236   2010-06-05   
301-401 A Frederick MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
301-402 A Washington Zone 2 MD BTHSMDRPDS0  9212 VERIZON MARYLAND, INC. 236      
301-403 A Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-404 A Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-404 0 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-404 1 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-404 2 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-404 3 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-404 4 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-404 5 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-404 6 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-404 7 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      

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

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