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 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-200 A Indian Head MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-04-25   
301-200 0 Indian Head MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-07-31   
301-200 1 Indian Head MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-04-25   
301-200 2 Indian Head MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-09-02   
301-200 3 Indian Head MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2011-10-03   
301-200 4 Indian Head MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2012-04-21   
301-200 5 Indian Head MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2012-06-03   
301-200 6 Indian Head MD   8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-06-20   
301-200 7 Indian Head MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2012-09-06   
301-200 8 Indian Head MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2012-09-06   
301-200 9 Indian Head MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2013-03-01   
301-202 A Washington Zone 2 MD BTVLMD18GT6  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2009-03-10   
301-202 0 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2009-03-10   
301-202 1 Washington Zone 2 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-07   
301-202 2 Washington Zone 2 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-07   
301-202 3 Washington Zone 2 MD   2589 US LEC OF MARYLAND, INC. 236   2010-06-08   
301-202 4 Washington Zone 2 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-07   
301-202 5 Washington Zone 2 MD   281E YMAX COMMUNICATIONS CORP. - MD 236   2010-06-08   
301-202 6 Washington Zone 2 MD   281E YMAX COMMUNICATIONS CORP. - MD 236   2010-06-08   
301-202 7 Washington Zone 2 MD   281E YMAX COMMUNICATIONS CORP. - MD 236   2010-01-15   
301-202 8 Washington Zone 2 MD   281E YMAX COMMUNICATIONS CORP. - MD 236   2010-01-15   
301-202 9 Washington Zone 2 MD   281E YMAX COMMUNICATIONS CORP. - MD 236   2010-01-15   
301-203 A Washington Zone 6 MD FTWSMDCPDS0  9212 VERIZON MARYLAND, INC. 236      
301-204 A Washington Zone 2 MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-204 0 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-204 1 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-204 2 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-204 3 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-204 4 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-204 5 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2005-03-24   
301-204 6 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2005-03-24   
301-204 7 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2005-03-24   
301-204 8 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236   2003-08-11   
301-204 9 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2005-03-24   
301-205 A Washington Zone 14 (Baltimore LATA) MD MAYOMDMYRS1  9212 VERIZON MARYLAND, INC. 238      
301-205 0 Washington Zone 14 (Baltimore LATA) MD   9212 VERIZON MARYLAND, INC. 238      
301-205 1 Washington Zone 14 (Baltimore LATA) MD   530H WIDE VOICE, LLC - MD 238   2016-05-14   
301-205 2 Washington Zone 14 (Baltimore LATA) MD   530H WIDE VOICE, LLC - MD 238   2016-05-14   
301-205 3 Washington Zone 14 (Baltimore LATA) MD   530H WIDE VOICE, LLC - MD 238   2016-05-14   
301-205 4 Washington Zone 14 (Baltimore LATA) MD   530H WIDE VOICE, LLC - MD 238   2016-05-14   
301-205 5 Washington Zone 14 (Baltimore LATA) MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238   2011-01-28   
301-205 6 Washington Zone 14 (Baltimore LATA) MD   530H WIDE VOICE, LLC - MD 238   2016-05-14   
301-205 7 Washington Zone 14 (Baltimore LATA) MD   530H WIDE VOICE, LLC - MD 238   2016-05-14   
301-205 8 Washington Zone 14 (Baltimore LATA) MD   530H WIDE VOICE, LLC - MD 238   2016-05-14   
301-205 9 Washington Zone 14 (Baltimore LATA) MD   530H WIDE VOICE, LLC - MD 238   2016-05-14   
301-206 A Washington Zone 13 MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-207 A Washington Zone 13 MD SLSPMDSSX6X  6630 USA MOBILITY WIRELESS, INC. 236      
301-208 A Gaithersburg MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-209 A Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-210 A Laurel MD MRKKMDMKDS0  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 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 >>

Last updated: Wed, 01 Apr 2020 02:09:16 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.