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.

Tomball, TX

<< 1 2 3 4 5 6 7 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
346-695 9   903C ONVOY, LLC - TX 560   2023-10-28   
346-753 A HSTNTX362MD  939H COMMIO, LLC 560   2024-02-23   
346-753 0   939H COMMIO, LLC 560   2024-02-23   
346-753 1   939H COMMIO, LLC 560   2024-02-23   
346-753 2   939H COMMIO, LLC 560   2024-02-23   
346-753 3   939H COMMIO, LLC 560   2024-02-23   
346-753 4   939H COMMIO, LLC 560   2024-02-23   
346-753 5   939H COMMIO, LLC 560   2024-02-23   
346-753 6   939H COMMIO, LLC 560   2024-02-23   
346-753 7   939H COMMIO, LLC 560   2024-02-23   
346-753 8   903C ONVOY, LLC - TX 560   2024-02-24   
346-753 9   903C ONVOY, LLC - TX 560   2024-02-24   
346-765 A HSTNTXMOX6X  624H ONVOY SPECTRUM, LLC 560   2024-03-11   
346-765 0   624H ONVOY SPECTRUM, LLC 560   2024-03-11   
346-765 1   624H ONVOY SPECTRUM, LLC 560   2024-03-11   
346-765 2   624H ONVOY SPECTRUM, LLC 560   2024-03-11   
346-765 3   624H ONVOY SPECTRUM, LLC 560   2024-03-11   
346-765 4   624H ONVOY SPECTRUM, LLC 560   2024-03-11   
346-765 5   624H ONVOY SPECTRUM, LLC 560   2024-03-11   
346-765 6   624H ONVOY SPECTRUM, LLC 560   2024-03-11   
346-765 7   624H ONVOY SPECTRUM, LLC 560   2024-03-11   
346-765 8   903C ONVOY, LLC - TX 560   2024-03-12   
346-765 9   903C ONVOY, LLC - TX 560   2024-03-12   
346-794 A HSTNTXYADS5  903C ONVOY, LLC - TX 560   2024-06-03   
346-794 0   903C ONVOY, LLC - TX 560   2024-06-03   
346-794 1   004F BANDWIDTH.COM CLEC, LLC - TX 560   2024-08-10   
346-794 2   004F BANDWIDTH.COM CLEC, LLC - TX 560   2024-08-10   
346-794 3   004F BANDWIDTH.COM CLEC, LLC - TX 560   2024-08-10   
346-794 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2024-12-20   
346-794 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2025-04-05   
346-794 6   177F PEERLESS NETWORK OF TEXAS, LLC - TX 560   2024-11-03   
346-794 7   073H TELNYX LLC 560   2024-10-05   
346-794 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2024-07-13   
346-794 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2024-07-13   
346-808 A HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560      
346-808 0   004F BANDWIDTH.COM CLEC, LLC - TX 560   2015-08-02   
346-808 1   004F BANDWIDTH.COM CLEC, LLC - TX 560   2015-08-02   
346-808 2   004F BANDWIDTH.COM CLEC, LLC - TX 560   2015-08-02   
346-808 3   516C AT&T CORP. 560   2015-08-31   
346-808 4   903C ONVOY, LLC - TX 560   2016-01-04   
346-808 5   318J COMCAST IP PHONE, LLC 560   2015-09-14   
346-808 6   903C ONVOY, LLC - TX 560   2016-01-04   
346-808 7   318J COMCAST IP PHONE, LLC 560   2016-12-05   
346-808 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2016-05-11   
346-808 9   515J IP HORIZON LLC 560   2016-03-28   
346-913 A   903C ONVOY, LLC - TX 560   2026-02-07   
346-913 0   903C ONVOY, LLC - TX 560   2026-02-07   
346-913 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2026-02-09   
346-913 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2026-02-09   
713-810 A HSTNTXMOX6X  624H ONVOY SPECTRUM, LLC 560      

<< 1 2 3 4 5 6 7 >>

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.