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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
301-404 8 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-404 9 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-405 A Washington Zone 4 MD   829J PAETEC ITEL, LLC 236   2025-04-02   
301-406 A Washington Zone 2 MD SLSPMDSSX6X  6630 SPOK, INC. 236      
301-407 A Gaithersburg MD PLVLMDPVRS2  9212 VERIZON MARYLAND, INC. 236      
301-407 0 Gaithersburg MD PLVLMDPVRS2  9212 VERIZON MARYLAND, INC. 236      
301-407 1 Gaithersburg MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2011-06-10   
301-407 2 Gaithersburg MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2014-10-23   
301-407 3 Gaithersburg MD BTVLMD12CMA  5562 METROPCS, INC. 236   2005-07-14   
301-407 4 Gaithersburg MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236   2003-05-10   
301-407 5 Gaithersburg MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-05-05   
301-407 6 Gaithersburg MD   829J PAETEC ITEL, LLC 236   2011-10-13   
301-407 7 Gaithersburg MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2005-12-29   
301-407 8 Gaithersburg MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-05-05   
301-407 9 Gaithersburg MD PLVLMDPVRS2  9212 VERIZON MARYLAND, INC. 236      
301-408 A Washington Zone 3 MD HYVLMDRIDS0  9212 VERIZON MARYLAND, INC. 236      
301-408 0 Washington Zone 3 MD HYVLMDRIDS0  9212 VERIZON MARYLAND, INC. 236      
301-408 1 Washington Zone 3 MD HYVLMDRIDS0  9212 VERIZON MARYLAND, INC. 236      
301-408 2 Washington Zone 3 MD HYVLMDRIDS0  9212 VERIZON MARYLAND, INC. 236      
301-408 3 Washington Zone 3 MD HYVLMDRIDS0  9212 VERIZON MARYLAND, INC. 236      
301-408 4 Washington Zone 3 MD HYVLMDRIDS0  9212 VERIZON MARYLAND, INC. 236      
301-408 5 Washington Zone 3 MD HYVLMDRIDS0  9212 VERIZON MARYLAND, INC. 236      
301-408 6 Washington Zone 3 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2011-08-19   
301-408 7 Washington Zone 3 MD HYVLMDRIDS0  9212 VERIZON MARYLAND, INC. 236      
301-408 8 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-06-15   
301-408 9 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-09-04   
301-409 A Washington Zone 2 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-409 0 Washington Zone 2 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2022-04-25   
301-409 1 Washington Zone 2 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-03-20   
301-409 2 Washington Zone 2 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-03-20   
301-409 3 Washington Zone 2 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2022-12-12   
301-409 4 Washington Zone 2 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2022-12-12   
301-409 5 Washington Zone 2 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2022-12-12   
301-409 6 Washington Zone 2 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2022-12-12   
301-409 7 Washington Zone 2 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-03-10   
301-409 8 Washington Zone 2 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-03-10   
301-409 9 Washington Zone 2 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-03-10   
301-410 A Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-410 0 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-06-26   
301-410 1 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-06-26   
301-410 2 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-06-26   
301-410 3 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-06-26   
301-410 4 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-06-26   
301-410 5 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-06-26   
301-410 6 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-06-26   
301-410 7 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-06-26   
301-410 8 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-06-26   
301-410 9 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-06-26   
301-412 A Washington Zone 2 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-413 A Washington Zone 11 MD RKVLMDMRDS0  9212 VERIZON MARYLAND, INC. 236      

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

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