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 85 86 87 88 89 90 91 92 93 94 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-575 5 Laurel MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236   2006-07-30   
301-575 6 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-08-07   
301-575 7 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-08-07   
301-575 8 Laurel MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-575 9 Laurel MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
301-576 A Washington Zone 3 MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-577 A Washington Zone 4 MD LNHMMDLNDS0  9212 VERIZON MARYLAND, INC. 236      
301-578 A Washington Zone 3 MD SLSPMDSSDS0  9212 VERIZON MARYLAND, INC. 236      
301-578 0 Washington Zone 3 MD SLSPMDSSDS0  9212 VERIZON MARYLAND, INC. 236      
301-578 1 Washington Zone 3 MD SLSPMDSSDS0  9212 VERIZON MARYLAND, INC. 236      
301-578 2 Washington Zone 3 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2020-06-13   
301-578 3 Washington Zone 3 MD WASHDC126MD  964H BARR TELL USA, INC. 236   2018-05-08   
301-578 4 Washington Zone 3 MD SLSPMDSSDS0  9212 VERIZON MARYLAND, INC. 236      
301-578 5 Washington Zone 3 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2020-06-13   
301-578 6 Washington Zone 3 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2018-07-19   
301-578 7 Washington Zone 3 MD WASIDCRG7MD  508J CENTURYLINK COMMUNICATIONS, LLC 236   2018-03-12   
301-578 8 Washington Zone 3 MD SLSPMDSSDS0  9212 VERIZON MARYLAND, INC. 236      
301-578 9 Washington Zone 3 MD SLSPMDSSDS0  9212 VERIZON MARYLAND, INC. 236      
301-579 A Brandywine MD BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      
301-579 0 Brandywine MD WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2019-12-16   
301-579 1 Brandywine MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
301-579 2 Brandywine MD BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      
301-579 3 Brandywine MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-01-04   
301-579 4 Brandywine MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2003-03-24   
301-579 5 Brandywine MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2004-12-13   
301-579 6 Brandywine MD BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      
301-579 7 Brandywine MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-03-03   
301-579 8 Brandywine MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-03-03   
301-579 9 Brandywine MD BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      
301-580 A Washington Zone 3 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-581 A Washington Zone 2 MD BTHSMDWWDS0  9212 VERIZON MARYLAND, INC. 236      
301-582 A Hagerstown MD WLPTMDWPRS2  9212 VERIZON MARYLAND, INC. 240      
301-582 0 Hagerstown MD WLPTMDWPRS2  9212 VERIZON MARYLAND, INC. 240      
301-582 1 Hagerstown MD WLPTMDWPRS2  9212 VERIZON MARYLAND, INC. 240      
301-582 2 Hagerstown MD WLPTMDWPRS2  9212 VERIZON MARYLAND, INC. 240      
301-582 3 Hagerstown MD WLPTMDWPRS2  9212 VERIZON MARYLAND, INC. 240      
301-582 4 Hagerstown MD WLPTMDWPRS2  9212 VERIZON MARYLAND, INC. 240      
301-582 5 Hagerstown MD WLPTMDWPRS2  9212 VERIZON MARYLAND, INC. 240      
301-582 6 Hagerstown MD WLPTMDWPRS2  9212 VERIZON MARYLAND, INC. 240      
301-582 7 Hagerstown MD WLPTMDWPRS2  9212 VERIZON MARYLAND, INC. 240      
301-582 8 Hagerstown MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2008-06-16   
301-582 9 Hagerstown MD WLPTMDWPRS2  9212 VERIZON MARYLAND, INC. 240      
301-583 A Washington Zone 4 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-583 0 Washington Zone 4 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-583 1 Washington Zone 4 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-583 2 Washington Zone 4 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-583 3 Washington Zone 4 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-583 4 Washington Zone 4 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-583 5 Washington Zone 4 MD LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-583 6 Washington Zone 4 MD BTVLMD127MD  5562 METROPCS, INC. 236   2013-06-03   

<< 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 85 86 87 88 89 90 91 92 93 94 >>

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.