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
301-888 A Washington Zone 16 MD BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      
301-888 0 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-07-19   
301-888 1 Washington Zone 16 MD BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      
301-888 2 Washington Zone 16 MD BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      
301-888 3 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-08-13   
301-888 4 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-07-28   
301-888 5 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2014-10-27   
301-888 6 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2014-10-27   
301-888 7 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-07-28   
301-888 8 Washington Zone 16 MD WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2012-04-02   
301-888 9 Washington Zone 16 MD BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      
301-889 A Washington Zone 14 (Baltimore LATA) MD GLVLMDGLRS1  9212 VERIZON MARYLAND, INC. 238      
301-889 0 Washington Zone 14 (Baltimore LATA) MD GLVLMDGLRS1  9212 VERIZON MARYLAND, INC. 238      
301-889 1 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-889 2 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-11-08   
301-889 3 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-889 4 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-889 5 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-889 6 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-889 7 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-889 8 Washington Zone 14 (Baltimore LATA) MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-07   
301-889 9 Washington Zone 14 (Baltimore LATA) MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-07   
301-890 A Washington Zone 12 MD BTVLMDBVDS0  9212 VERIZON MARYLAND, INC. 236      
301-891 A Washington Zone 3 MD HYVLMDCMDS0  9212 VERIZON MARYLAND, INC. 236      
301-891 0 Washington Zone 3 MD HYVLMDCMDS0  9212 VERIZON MARYLAND, INC. 236      
301-891 1 Washington Zone 3 MD HYVLMDCMDS0  9212 VERIZON MARYLAND, INC. 236      
301-891 2 Washington Zone 3 MD HYVLMDCMDS0  9212 VERIZON MARYLAND, INC. 236      
301-891 3 Washington Zone 3 MD HYVLMDCMDS0  9212 VERIZON MARYLAND, INC. 236      
301-891 4 Washington Zone 3 MD HYVLMDCMDS0  9212 VERIZON MARYLAND, INC. 236      
301-891 5 Washington Zone 3 MD HYVLMDCMDS0  9212 VERIZON MARYLAND, INC. 236      
301-891 6 Washington Zone 3 MD HYVLMDCMDS0  9212 VERIZON MARYLAND, INC. 236      
301-891 7 Washington Zone 3 MD HYVLMDCMDS0  9212 VERIZON MARYLAND, INC. 236      
301-891 8 Washington Zone 3 MD HYVLMDCMDS0  9212 VERIZON MARYLAND, INC. 236      
301-891 9 Washington Zone 3 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2014-11-06   
301-892 A Washington Zone 4 MD HYVLMDHYPS0  9212 VERIZON MARYLAND, INC. 236      
301-892 0 Washington Zone 4 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2011-06-02   
301-892 1 Washington Zone 4 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2011-09-02   
301-892 2 Washington Zone 4 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2011-06-27   
301-892 3 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-20   
301-892 4 Washington Zone 4 MD   829J PAETEC ITEL, LLC 236   2010-09-22   
301-892 5 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-20   
301-892 6 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2012-05-12   
301-892 7 Washington Zone 4 MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2010-09-01   
301-892 8 Washington Zone 4 MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2010-09-01   
301-892 9 Washington Zone 4 MD HYVLMDHYPS0  9212 VERIZON MARYLAND, INC. 236   2005-05-02   
301-893 A Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-893 0 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-893 1 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-893 2 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-893 3 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      

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

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