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.

OCN: 6114 LEVEL 3 COMMUNICATIONS, LLC - TX

<< 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 95 96 97 98 99 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
972-657 3 Irving TX   552      
972-666 4 Bristol TX   552   2006-10-07   
972-666 6 Bristol TX   552   2019-07-13   
972-675 7 Plano TX   552   2011-01-12   
972-684 5 Dallas TX   552   2014-06-11   
972-696 0 Plano TX   552   2008-10-24   
972-696 7 Plano TX   552   2008-06-06   
972-704 1 Frisco EACS TX   552   2004-12-02   
972-704 7 Frisco EACS TX   552   2006-04-24   
972-737 2 Allen TX   552   2015-05-10   
972-746 A Irving TX DLLATX37DS6  552      
972-746 2 Irving TX   552   2004-06-15   
972-746 4 Irving TX   552      
972-755 1 Dallas TX   552   2007-09-24   
972-755 3 Dallas TX   552   2007-10-25   
972-755 4 Dallas TX   552   2004-07-29   
972-769 5 Plano TX   552   2007-07-05   
972-769 6 Plano TX   552   2007-07-05   
972-774 5 Dallas TX   552   2011-08-02   
972-776 2 Dallas TX   552   2011-01-15   
972-776 6 Dallas TX   552   2011-06-19   
972-782 2 Farmersville TX   552   2004-11-27   
972-782 4 Farmersville TX   552   2006-04-09   
972-782 9 Farmersville TX   552   2006-06-24   
972-784 0 Farmersville EMS TX   552   2012-02-19   
972-784 4 Farmersville EMS TX   552   2008-05-14   
972-791 8 Irving EMS TX   552   2007-07-26   
972-793 0 Irving TX   552   2011-04-30   
972-793 8 Irving TX   552   2008-05-19   
972-798 A Carrollton TX   552   2025-04-06   
972-798 1 Carrollton TX   552      
972-798 2 Carrollton TX   552      
972-798 4 Carrollton TX   552      
972-798 5 Carrollton TX   552      
972-805 A Plano TX   552      
972-805 0 Plano TX   552      
972-805 1 Plano TX   552      
972-805 2 Plano TX   552      
972-805 4 Plano TX   552      
972-805 5 Plano TX   552      
972-805 8 Plano TX   552      
972-805 9 Plano TX   552      
972-810 2 Carrollton TX   552   2013-11-04   
972-810 7 Carrollton TX   552   2012-02-19   
972-815 1 Irving TX   552   2007-09-17   
972-829 A Lewisville TX   552      
972-829 0 Lewisville TX   552      
972-829 3 Lewisville TX   552      
972-829 4 Lewisville TX   552      
972-829 6 Lewisville TX   552      

<< 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 95 96 97 98 99 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.