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
301-852 5 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-852 6 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-852 7 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-852 8 Washington Zone 4 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-852 9 Washington Zone 4 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-853 A Washington Zone 4 MD HYVLMDCMDS0  9212 VERIZON MARYLAND, INC. 236      
301-854 A Ashton (Baltimore LATA) MD CLVLMDCERP0  9212 VERIZON MARYLAND, INC. 238   2024-01-30   
301-854 0 Ashton (Baltimore LATA) MD CLVLMDCERP0  9212 VERIZON MARYLAND, INC. 238      
301-854 1 Ashton (Baltimore LATA) MD CLVLMDCERP0  9212 VERIZON MARYLAND, INC. 238      
301-854 2 Ashton (Baltimore LATA) MD CLVLMDCERP0  9212 VERIZON MARYLAND, INC. 238      
301-854 3 Ashton (Baltimore LATA) MD CLVLMDCERP0  9212 VERIZON MARYLAND, INC. 238      
301-854 4 Ashton (Baltimore LATA) MD GLWDMDGDRS1  9212 VERIZON MARYLAND, INC. 238      
301-854 5 Ashton (Baltimore LATA) MD GLWDMDGDRS1  9212 VERIZON MARYLAND, INC. 238      
301-854 6 Ashton (Baltimore LATA) MD GLWDMDGDRS1  9212 VERIZON MARYLAND, INC. 238      
301-854 7 Ashton (Baltimore LATA) MD GLWDMDGDRS1  9212 VERIZON MARYLAND, INC. 238      
301-854 8 Ashton (Baltimore LATA) MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
301-854 9 Ashton (Baltimore LATA) MD CLVLMDCERP0  9212 VERIZON MARYLAND, INC. 238      
301-855 A Washington Zone 15 (Baltimore LATA) MD NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-855 0 Washington Zone 15 (Baltimore LATA) MD NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-855 1 Washington Zone 15 (Baltimore LATA) MD PRFRMDPFRS1  9212 VERIZON MARYLAND, INC. 238      
301-855 2 Washington Zone 15 (Baltimore LATA) MD NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-855 3 Washington Zone 15 (Baltimore LATA) MD NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-855 4 Washington Zone 15 (Baltimore LATA) MD NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-855 5 Washington Zone 15 (Baltimore LATA) MD NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-855 6 Washington Zone 15 (Baltimore LATA) MD NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-855 7 Washington Zone 15 (Baltimore LATA) MD NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-855 8 Washington Zone 15 (Baltimore LATA) MD NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-855 9 Washington Zone 15 (Baltimore LATA) MD PRFRMDPFRS1  9212 VERIZON MARYLAND, INC. 238      
301-856 A Washington Zone 16 MD CLTNMDCLDS0  9212 VERIZON MARYLAND, INC. 236      
301-857 A Clear Spring MD HGTWMD53DS0  2593 CORE COMMUNICATIONS, INC.- MD 240      
301-857 0 Clear Spring MD FRDRMDFRPS0  2593 CORE COMMUNICATIONS, INC.- MD 240      
301-857 1 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-857 2 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-857 3 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-857 4 Clear Spring MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240      
301-857 5 Clear Spring MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240      
301-857 6 Clear Spring MD FRDRMDFRXKX  508J CENTURYLINK COMMUNICATIONS, LLC 240      
301-857 7 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-857 8 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-857 9 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-858 A Washington Zone 14 (Baltimore LATA) MD COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-858 0 Washington Zone 14 (Baltimore LATA) MD COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-858 1 Washington Zone 14 (Baltimore LATA) MD COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-858 2 Washington Zone 14 (Baltimore LATA) MD PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-858 3 Washington Zone 14 (Baltimore LATA) MD PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-858 4 Washington Zone 14 (Baltimore LATA) MD PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-858 5 Washington Zone 14 (Baltimore LATA) MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
301-858 6 Washington Zone 14 (Baltimore LATA) MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
301-858 7 Washington Zone 14 (Baltimore LATA) MD STMRMDSMRS1  9212 VERIZON MARYLAND, INC. 238      
301-858 8 Washington Zone 14 (Baltimore LATA) MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
301-858 9 Washington Zone 14 (Baltimore LATA) MD COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-859 A Oakland MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
301-859 0 Oakland MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-859 1 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240      
301-859 2 Oakland MD FRDRMDFRXAX  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 240      
301-859 3 Oakland MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
301-859 4 Oakland MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
301-859 5 Oakland MD   5562 METROPCS, INC. 240      
301-859 6 Oakland MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240      
301-859 7 Oakland MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240      
301-859 8 Oakland MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
301-859 9 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240      
301-860 A Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 0 Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 1 Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 2 Washington Zone 14 MD BTVLMD127MD  5562 METROPCS, INC. 236      
301-860 3 Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 4 Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 5 Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 6 Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 7 Washington Zone 14 MD BTVLMD127MD  5562 METROPCS, INC. 236      
301-860 8 Washington Zone 14 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-860 9 Washington Zone 14 MD BTVLMD127MD  5562 METROPCS, INC. 236      
301-861 A Waldorf MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-861 0 Waldorf MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-861 1 Waldorf MD HRNDVACKBMD  5966 LIGHTWAVE COMMUNICATIONS, LLC - MD 236      
301-861 2 Waldorf MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-861 3 Waldorf MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-861 4 Waldorf MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-861 5 Waldorf MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-861 6 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-861 7 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-861 8 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-861 9 Waldorf MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-862 A Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-862 0 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-862 1 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-862 2 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-862 3 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-862 4 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-862 5 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-862 6 Lexington Park-Great Mills MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-862 7 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-862 8 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-862 9 Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-863 A Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-864 A Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-865 A New Market MD NWMRMDNERS3  9212 VERIZON MARYLAND, INC. 240      
301-866 A Lexington Park-Great Mills MD LXPKMDLXDS0  9212 VERIZON MARYLAND, INC. 236      
301-866 0 Lexington Park-Great Mills MD LXPKMDLXDS0  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: LES.NET

Like this site? We accept donations via PayPal.