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
713-490 A HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560      
713-491 A HSTNTXNEDS0  9533 SOUTHWESTERN BELL 560      
713-491 0 HSTNTXNEDS0  9533 SOUTHWESTERN BELL 560      
713-491 1 HSTNTXNEDS0  9533 SOUTHWESTERN BELL 560      
713-491 2 HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2012-09-16   
713-491 3 HSTNTX01X7X  516C AT&T CORP. 560   2016-09-12   
713-491 4 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-01-05   
713-491 5 HSTNTXNEDS0  9533 SOUTHWESTERN BELL 560      
713-491 6 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-01-05   
713-491 7 HSTNTXNEDS0  9533 SOUTHWESTERN BELL 560      
713-491 8 HSTNTXNEDS0  9533 SOUTHWESTERN BELL 560      
713-491 9 HSTNTXNEDS0  9533 SOUTHWESTERN BELL 560      
713-492 A HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-492 0 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2004-05-31   
713-492 1 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2005-04-29   
713-492 2 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2004-05-31   
713-492 3 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2004-11-15   
713-492 4 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2004-11-15   
713-492 5 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2004-11-15   
713-492 6 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2004-11-15   
713-492 7 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2004-11-15   
713-492 8 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2004-11-15   
713-492 9 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-493 A HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2024-12-17   
713-493 0 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-493 1 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2004-09-18   
713-493 2 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-493 3 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2004-02-20   
713-493 4 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2004-02-20   
713-493 5 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2004-02-20   
713-493 6 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-493 7 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-493 8 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2004-09-18   
713-493 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2004-09-18   
713-494 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-495 A HSTNTXCLDS1  9533 SOUTHWESTERN BELL 560      
713-496 A HSTNTXYADS5  903C ONVOY, LLC - TX 560      
713-496 0 HSTNTXGI1MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2011-04-28   
713-496 1 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2010-06-17   
713-496 2 HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2010-10-02   
713-496 3 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2010-07-21   
713-496 4 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2010-07-21   
713-496 5 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2010-07-21   
713-496 6 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2010-07-21   
713-496 7 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2010-07-21   
713-496 8 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2010-07-21   
713-496 9 HSTATX750MD  829J PAETEC ITEL, LLC 560   2011-04-24   
713-497 A HSTNTXCLDS2  9533 SOUTHWESTERN BELL 560      
713-497 0 HSTNTXNEDS0  9533 SOUTHWESTERN BELL 560      
713-497 1 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2017-08-08   
713-497 2 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-497 3 HSTNTXCLDS2  9533 SOUTHWESTERN BELL 560      
713-497 4 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2014-04-22   
713-497 5 HSTNTX01X7X  516C AT&T CORP. 560   2013-07-29   
713-497 6 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2014-04-22   
713-497 7 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2014-04-22   
713-497 8 HSTNTXIDRP0  9533 SOUTHWESTERN BELL 560      
713-497 9 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2014-04-22   
713-498 A HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-499 A HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-499 0 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2004-09-18   
713-499 1 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-499 2 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-499 3 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-499 4 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-499 5 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-499 6 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-499 7 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-499 8 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-499 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2004-09-18   
713-500 A HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-501 A HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-502 A HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-503 A HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-504 A HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-505 A HSTNTX01X7X  516C AT&T CORP. 560      
713-505 0 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2006-10-14   
713-505 1 HSTNTX01X7X  516C AT&T CORP. 560      
713-505 2 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2006-10-14   
713-505 3 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2006-10-14   
713-505 4 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2006-10-14   
713-505 5 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2006-10-14   
713-505 6 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2006-10-14   
713-505 7 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2006-10-14   
713-505 8 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2006-10-14   
713-505 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2006-10-14   
713-506 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
713-507 A HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-508 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
713-509 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
713-512 A HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-512 0 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-512 1 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-512 2 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-512 3 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-512 4 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-512 5 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-01-05   
713-512 6 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-512 7 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-512 8 HSTNTXMCDS0  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: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.