Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 301 [Rate centres in NPA 301] [Dial plan for NPA 301]

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-883 5 Washington Zone 5 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-883 6 Washington Zone 5 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-883 7 Washington Zone 5 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-883 8 Washington Zone 5 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-883 9 Washington Zone 5 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-884 A Mechanicsville MD MCHVMDMCRS1  9212 VERIZON MARYLAND, INC. 236      
301-885 A Waldorf MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-885 0 Waldorf MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-885 1 Waldorf MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-885 2 Waldorf MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-885 3 Waldorf MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-885 4 Waldorf MD LARLMDLR3MD  2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 236      
301-885 5 Waldorf MD LARLMDCCDS0  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 236      
301-885 6 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-885 7 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-885 8 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-885 9 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-886 A Washington Zone 13 MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-886 0 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-886 2 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-886 3 Washington Zone 13 MD CHCHMDBE1MD  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236      
301-886 4 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-886 6 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-886 7 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-886 8 Washington Zone 13 MD HRNDVACKAMD  1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-887 A Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-887 0 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-887 1 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-887 2 Washington Zone 4 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-887 3 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-887 4 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-887 5 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-887 6 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-887 7 Washington Zone 4 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-887 8 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-887 9 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
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      
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      
301-888 4 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-888 5 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-888 6 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-888 7 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-888 8 Washington Zone 16 MD WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
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      
301-889 2 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
301-889 3 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-889 4 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-889 5 Washington Zone 14 (Baltimore LATA) MD   321J HD CARRIER LLC 238      
301-889 6 Washington Zone 14 (Baltimore LATA) MD   321J HD CARRIER LLC 238      
301-889 7 Washington Zone 14 (Baltimore LATA) MD   321J HD CARRIER LLC 238      
301-889 8 Washington Zone 14 (Baltimore LATA) MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
301-889 9 Washington Zone 14 (Baltimore LATA) MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
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      
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      
301-892 1 Washington Zone 4 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-892 2 Washington Zone 4 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-892 3 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-892 4 Washington Zone 4 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
301-892 5 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-892 6 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-892 7 Washington Zone 4 MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236      
301-892 8 Washington Zone 4 MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236      
301-892 9 Washington Zone 4 MD HYVLMDHYPS0  9212 VERIZON MARYLAND, INC. 236      
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      
301-893 4 Washington Zone 6 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-893 5 Washington Zone 6 MD BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-893 6 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-893 7 Washington Zone 6 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-893 8 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-893 9 Washington Zone 6 MD   145J TERRA NOVA TELECOM INC. 236      
301-894 A Washington Zone 6 MD TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-895 A Grantsville MD GTVLMDGRRS0  9212 VERIZON MARYLAND, INC. 240      
301-895 0 Grantsville MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-895 1 Grantsville MD HGTWMD530MD  073H TELNYX LLC 240      
301-895 2 Grantsville MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-895 3 Grantsville MD GTVLMDGRRS0  9212 VERIZON MARYLAND, INC. 240      
301-895 4 Grantsville MD GTVLMDGRRS0  9212 VERIZON MARYLAND, INC. 240      
301-895 5 Grantsville MD GTVLMDGRRS0  9212 VERIZON MARYLAND, INC. 240      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 >>

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.