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.

Houston, 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 99 100 101 102 103 104 105 106 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
713-437 A HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-437 0 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2004-10-16   
713-437 1 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-437 2 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2015-08-27   
713-437 3 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2005-10-18   
713-437 4 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-437 5 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-437 6 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-437 7 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2013-09-15   
713-437 8 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-437 9 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2007-05-02   
713-438 A HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-438 0 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-438 1 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-438 2 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-10-23   
713-438 3 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-10-23   
713-438 4 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2014-04-22   
713-438 5 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2014-04-22   
713-438 6 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-438 7 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-10-23   
713-438 8 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-10-23   
713-438 9 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-439 A HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-440 A HSTNTXRIDS0  9533 SOUTHWESTERN BELL 560      
713-440 0 HSTNTXRIDS0  9533 SOUTHWESTERN BELL 560      
713-440 1 HSTNTXRIDS0  9533 SOUTHWESTERN BELL 560      
713-440 2 HSTNTXRIDS0  9533 SOUTHWESTERN BELL 560      
713-440 3 HSTNTXRIDS0  9533 SOUTHWESTERN BELL 560      
713-440 4 HSTNTXRIDS0  9533 SOUTHWESTERN BELL 560      
713-440 5 HSTNTXRIDS0  9533 SOUTHWESTERN BELL 560      
713-440 6 HSTNTXRIDS0  9533 SOUTHWESTERN BELL 560      
713-440 7 HSTNTXRIDS0  9533 SOUTHWESTERN BELL 560      
713-440 8 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2017-08-11   
713-440 9 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2017-08-11   
713-441 A HSTGTX05AMD  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-442 A HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-443 A HSTDTXBGBMD  5562 METROPCS, INC. 560      
713-443 0 HSTDTXBGBMD  5562 METROPCS, INC. 560      
713-443 1 HSTDTXBGBMD  5562 METROPCS, INC. 560      
713-443 2 HSTDTXBGBMD  5562 METROPCS, INC. 560      
713-443 3 HSTDTXBGBMD  5562 METROPCS, INC. 560      
713-443 4 HSTDTXBGBMD  5562 METROPCS, INC. 560      
713-443 5 HSTDTXBGBMD  5562 METROPCS, INC. 560      
713-443 6 HSTDTXBGBMD  5562 METROPCS, INC. 560      
713-443 7 HSTDTXBGBMD  5562 METROPCS, INC. 560      
713-443 8 HSTDTXBGBMD  5562 METROPCS, INC. 560      
713-443 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-444 A HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-445 A HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-445 0 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-445 1 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-445 2 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-445 3 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-445 4 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-445 5 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-445 6 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2007-12-03   
713-445 7 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-445 8 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-445 9 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-446 A HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-446 0 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-446 1 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-446 2 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-446 3 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-446 4 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-446 5 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-446 6 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-446 7 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-446 8 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-446 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-447 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-448 A HSTNTXPRDS0  9533 SOUTHWESTERN BELL 560      
713-448 0 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2005-12-30   
713-448 1 HSTNTXPRDS0  9533 SOUTHWESTERN BELL 560      
713-448 2 HSTNTXPRDS0  9533 SOUTHWESTERN BELL 560      
713-448 3 HSTNTXPRDS0  9533 SOUTHWESTERN BELL 560      
713-448 4 HSTNTXPRDS0  9533 SOUTHWESTERN BELL 560      
713-448 5 HSTNTXPRDS0  9533 SOUTHWESTERN BELL 560      
713-448 6 HSTNTXPRDS0  9533 SOUTHWESTERN BELL 560      
713-448 7 HSTNTXPRDS0  9533 SOUTHWESTERN BELL 560      
713-448 8 HSTNTXPRDS0  9533 SOUTHWESTERN BELL 560      
713-448 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2006-03-11   
713-449 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-450 A HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      
713-451 A HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      
713-452 A HSTGTX05AMD  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-452 0 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2008-10-05   
713-452 1 HSTGTX05AMD  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2008-06-13   
713-452 2 HSTGTX05AMD  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2008-06-13   
713-452 3 HSTGTX05AMD  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2008-06-13   
713-452 4 HSTGTX05AMD  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2008-06-13   
713-452 5 HSTGTX05AMD  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2008-06-13   
713-452 6 HSTGTX05AMD  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2008-06-13   
713-452 7 HSTGTX05AMD  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2008-06-13   
713-452 8 HSTGTX05AMD  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2008-06-13   
713-452 9 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2008-10-05   
713-453 A HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      
713-453 0 HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      
713-453 1 HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      
713-453 2 HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      

<< 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 99 100 101 102 103 104 105 106 >>

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.