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 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
713-550 A HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
713-550 0 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2003-07-12   
713-550 1 HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
713-550 2 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2003-07-12   
713-550 3 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2003-07-12   
713-550 4 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2003-07-12   
713-550 5 HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
713-550 6 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2003-07-12   
713-550 7 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2003-07-12   
713-550 8 HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
713-550 9 HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
713-551 A HSTNTXPADS0  9533 SOUTHWESTERN BELL 560      
713-551 0 HSTNTXPADS0  9533 SOUTHWESTERN BELL 560      
713-551 1 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2004-11-25   
713-551 2 HSTNTXPADS0  9533 SOUTHWESTERN BELL 560      
713-551 3 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2007-05-30   
713-551 4 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2004-11-11   
713-551 5 HSTNTXPADS0  9533 SOUTHWESTERN BELL 560      
713-551 6 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2004-11-25   
713-551 7 HSTNTXPADS0  9533 SOUTHWESTERN BELL 560      
713-551 8 HSTNTXPADS0  9533 SOUTHWESTERN BELL 560      
713-551 9 HSTNTXPADS0  9533 SOUTHWESTERN BELL 560      
713-552 A HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-552 0 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-552 1 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-552 2 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-552 3 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2007-05-02   
713-552 4 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-552 5 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-552 6 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-552 7 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-552 8 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-552 9 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-553 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-553 0 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-553 1 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-553 2 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2019-06-08   
713-553 3 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-553 4 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-553 5 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-553 6 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-553 7 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-553 8 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-553 9 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-554 A HSTWTXBIDS0  7715 MATRIX TELECOM, LLC. S/I/I TNCI - TX 560      
713-556 A HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560      
713-556 0 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560   2006-03-09   
713-556 1 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560   2006-03-09   
713-556 2 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560   2006-03-09   
713-556 3 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560   2006-03-09   
713-556 4 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560   2006-03-09   
713-556 5 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560   2006-03-09   
713-556 6 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560   2006-03-09   
713-556 7 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560   2006-03-09   
713-556 8 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560   2006-03-09   
713-556 9 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560   2006-03-09   
713-557 A HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-558 A HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-559 A HSTWTXBIDS0  7715 MATRIX TELECOM, LLC. S/I/I TNCI - TX 560      
713-560 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-561 A HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-561 0 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-561 1 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2014-05-04   
713-561 2 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2014-05-04   
713-561 3 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2013-07-23   
713-561 4 HSTNTXFADS0  9533 SOUTHWESTERN BELL 560      
713-561 5 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2013-07-23   
713-561 6 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-561 7 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-561 8 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-561 9 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-562 A HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-563 A HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-566 A HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-566 0 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2007-01-05   
713-566 1 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2007-01-05   
713-566 2 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-566 3 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-566 4 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-566 5 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-566 6 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-566 7 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-566 8 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-566 9 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-567 A HSTXTXSMRS0  9533 SOUTHWESTERN BELL 560      
713-568 A HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-568 0 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2019-01-10   
713-568 1 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-12-07   
713-568 2 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-12-02   
713-568 3 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-12-07   
713-568 4 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-12-07   
713-568 5 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-12-07   
713-568 6 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-12-07   
713-568 7 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-12-07   
713-568 8 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-12-07   
713-568 9 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-12-07   
713-569 A HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-571 A HSTNTXCLDS2  9533 SOUTHWESTERN BELL 560      
713-571 0 HSTNTXCLDS2  9533 SOUTHWESTERN BELL 560      
713-571 1 HSTNTXCLDS2  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 >>

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.