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.

NPA: 346 [Rate centres in NPA 346] [Dial plan for NPA 346]

NXX: 570

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-570 A Houston Suburban TX HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
346-570 0 Houston Suburban TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2016-12-24   
346-570 1 Houston Suburban TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2016-12-24   
346-570 2 Houston Suburban TX HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2017-09-04   
346-570 3 Houston Suburban TX HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2017-09-15   
346-570 4 Houston Suburban TX HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2016-10-29   
346-570 5 Houston Suburban TX HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2017-05-18   
346-570 6 Houston Suburban TX HSTNTX01DS5  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2017-08-01   
346-570 7 Houston Suburban TX HSTNTX01DS5  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2017-08-01   
346-570 8 Houston Suburban TX HSTNTX01DS5  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2017-08-01   
346-570 9 Houston Suburban TX HSTNTX01DS5  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2017-08-01   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.