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 Suburban, 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 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
281-497 7 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-497 8 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-497 9 HSTNTXMOX6X  624H ONVOY SPECTRUM, LLC 560   2021-10-25   
281-498 A HSTNTXALDS0  9533 SOUTHWESTERN BELL 560      
281-498 0 HSTNTXALDS0  9533 SOUTHWESTERN BELL 560      
281-498 1 HSTNTXALDS0  9533 SOUTHWESTERN BELL 560      
281-498 2 HSTNTXALDS0  9533 SOUTHWESTERN BELL 560      
281-498 3 HSTNTXALDS0  9533 SOUTHWESTERN BELL 560      
281-498 4 HSTNTXALDS0  9533 SOUTHWESTERN BELL 560      
281-498 5 HSTNTXALDS0  9533 SOUTHWESTERN BELL 560      
281-498 6 HSTNTXALDS0  9533 SOUTHWESTERN BELL 560      
281-498 7 HSTNTXALDS0  9533 SOUTHWESTERN BELL 560      
281-498 8 HSTNTXALDS0  9533 SOUTHWESTERN BELL 560      
281-498 9 HSTNTXMOX6X  624H ONVOY SPECTRUM, LLC 560   2021-10-25   
281-504 A HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 0 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 1 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 2 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 3 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 4 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 5 HSTNTXMOX6X  624H ONVOY SPECTRUM, LLC 560   2022-05-22   
281-504 6 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 7 HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2011-04-28   
281-504 8 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 9 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-506 A HSTNTXGIDS0  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
281-506 0 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-05-07   
281-506 1 HSTNTXGIDS0  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
281-506 2 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-05-07   
281-506 3 HSTNTXGIDS0  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
281-506 4 HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2011-04-28   
281-506 5 HSTDTXBGBMD  5562 METROPCS, INC. 560   2006-05-19   
281-506 6 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2014-11-24   
281-506 7 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2013-07-26   
281-506 8 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2007-03-29   
281-506 9 HSTNTXGIDS0  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
281-509 A HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-509 0 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2010-12-10   
281-509 1 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2010-12-10   
281-509 2 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2010-12-10   
281-509 3 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2010-12-10   
281-509 4 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2010-12-10   
281-509 5 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2010-12-10   
281-509 6 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-509 7 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2006-06-17   
281-509 8 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-509 9 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2007-12-05   
281-512 A HSTDTXBGBMD  5562 METROPCS, INC. 560      
281-512 0 HSTDTXBGBMD  5562 METROPCS, INC. 560   2012-11-16   
281-512 1 HSTDTXBGBMD  5562 METROPCS, INC. 560   2012-11-16   
281-512 2 HSTDTXBGBMD  5562 METROPCS, INC. 560   2012-11-16   
281-512 3 HSTDTXBGBMD  5562 METROPCS, INC. 560   2012-11-16   
281-512 4 HSTDTXBGBMD  5562 METROPCS, INC. 560   2012-11-16   
281-512 5 HSTDTXBGBMD  5562 METROPCS, INC. 560   2012-11-16   
281-512 6 HSTDTXBGBMD  5562 METROPCS, INC. 560   2012-11-16   
281-512 7 HSTDTXBGBMD  5562 METROPCS, INC. 560   2012-11-16   
281-512 8 HSTDTXBGBMD  5562 METROPCS, INC. 560   2012-11-16   
281-512 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2012-11-16   
281-529 A HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-529 0 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-529 1 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-529 2 HSTNTX01MMD  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2019-10-07   
281-529 3 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-529 4 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-529 5 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2008-02-01   
281-529 6 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2011-09-30   
281-529 7 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2020-10-10   
281-529 8 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-529 9 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-530 A HSTNTXALDS0  9533 SOUTHWESTERN BELL 560      
281-531 A HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-544 A HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-544 0 HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2011-05-22   
281-544 1 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-544 2 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-544 3 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-544 4 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-544 5 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-544 6 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-544 7 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-544 8 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-544 9 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-552 A HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-552 0 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-552 1 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-552 2 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-552 3 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-552 4 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-552 5 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-552 6 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-552 7 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2009-03-17   
281-552 8 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2008-07-29   
281-552 9 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-556 A HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-556 0 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-556 1 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-556 2 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-556 3 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2020-01-05   
281-556 4 HSTNTXBUDS0  9533 SOUTHWESTERN BELL 560      
281-556 5 HSTNTXBUDS0  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 >>

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.