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
301-866 1 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-866 2 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-866 3 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-866 4 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-866 5 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-866 6 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-866 7 Lexington Park-Great Mills MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-866 9 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-867 A Washington Zone 14 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-867 0 Washington Zone 14 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-867 1 Washington Zone 14 MD OCQNVAXAVMD  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-867 2 Washington Zone 14 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-867 3 Washington Zone 14 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-867 4 Washington Zone 14 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-867 5 Washington Zone 14 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-867 6 Washington Zone 14 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-867 7 Washington Zone 14 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-867 8 Washington Zone 14 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-867 9 Washington Zone 14 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-868 A Washington Zone 16 MD CLTNMDCLDS0  9212 VERIZON MARYLAND, INC. 236      
301-869 A Gaithersburg MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-870 A Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-870 0 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-870 1 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-870 2 Washington Zone 6 MD LPLTMDLADS0  9212 VERIZON MARYLAND, INC. 236      
301-870 3 Washington Zone 6 MD LPLTMDLADS0  9212 VERIZON MARYLAND, INC. 236      
301-870 4 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-870 5 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-870 6 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-870 7 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-870 8 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-870 9 Washington Zone 6 MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-871 A Washington Zone 11 MD SLSPMDNBDS0  9212 VERIZON MARYLAND, INC. 236      
301-872 A Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-872 0 Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-872 1 Ridge MD WASHDC127MD  073H TELNYX LLC 236      
301-872 2 Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-872 3 Ridge MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-872 4 Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-872 5 Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-872 6 Ridge MD   073H TELNYX LLC 236      
301-872 7 Ridge MD   073H TELNYX LLC 236      
301-872 8 Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-872 9 Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-873 A Washington Zone 3 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-874 A Buckeystown MD BCTWMDBTRS1  9212 VERIZON MARYLAND, INC. 240      
301-875 A Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-875 0 Laurel MD CHCHMDBE1MD  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236      
301-875 1 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-875 2 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-875 3 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-875 4 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-875 5 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-875 6 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-875 7 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-875 8 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-875 9 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-876 A Cumberland MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
301-876 0 Cumberland MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-876 1 Cumberland MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-876 2 Cumberland MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-876 3 Cumberland MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-876 4 Cumberland MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
301-876 5 Cumberland MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-876 6 Cumberland MD FRDRMDFRXPX  624H ONVOY SPECTRUM, LLC 240      
301-876 7 Cumberland MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-876 8 Cumberland MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-876 9 Cumberland MD MRBGWVBUHPA  4095 FIBERNET, LLC - WV 240      
301-877 A Washington Zone 16 MD CLTNMDCLDS0  9212 VERIZON MARYLAND, INC. 236      
301-878 A Baltimore MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
301-879 A Washington Zone 12 MD SLSPMDCVDS0  9212 VERIZON MARYLAND, INC. 236      
301-880 A Lexington Park-Great Mills MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-880 0 Lexington Park-Great Mills MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-880 1 Lexington Park-Great Mills MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-880 2 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-880 3 Lexington Park-Great Mills MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-880 4 Lexington Park-Great Mills MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-880 5 Lexington Park-Great Mills MD HRNDVACKBMD  5966 LIGHTWAVE COMMUNICATIONS, LLC - MD 236      
301-880 6 Lexington Park-Great Mills MD BTVLMD12CMA  5562 METROPCS, INC. 236      
301-880 7 Lexington Park-Great Mills MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-880 8 Lexington Park-Great Mills MD WASIDCRG7MD  508J CENTURYLINK COMMUNICATIONS, LLC 236      
301-880 9 Lexington Park-Great Mills MD SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
301-881 A Washington Zone 11 MD RKVLMDMRDS0  9212 VERIZON MARYLAND, INC. 236      
301-882 A New Market MD HGTWMD53DS0  2593 CORE COMMUNICATIONS, INC.- MD 240      
301-882 0 New Market MD FRDRMDFRPS0  2593 CORE COMMUNICATIONS, INC.- MD 240      
301-882 1 New Market MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-882 2 New Market MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-882 3 New Market MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-882 4 New Market MD FRDRMDFRXTX  318J COMCAST IP PHONE, LLC 240      
301-882 5 New Market MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-882 6 New Market MD FRDRMDFRAMD  2589 US LEC OF MARYLAND, INC. 240      
301-882 7 New Market MD FRDRMDFRXTX  318J COMCAST IP PHONE, LLC 240      
301-882 8 New Market MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-882 9 New Market MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-883 A Washington Zone 5 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-883 0 Washington Zone 5 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-883 1 Washington Zone 5 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-883 2 Washington Zone 5 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-883 3 Washington Zone 5 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-883 4 Washington Zone 5 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      

<< 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.