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: 936 [Rate centres in NPA 936] [Dial plan for NPA 936]

NXX: 999

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
936-999 A Zavalla TX HSTQTXRG6MD  139F WORLDCALL INTERCONNECT INC. 560      
936-999 3 Zavalla TX LFKNTXXA6MD  903C ONVOY, LLC - TX 560   2021-04-12   
936-999 4 Zavalla TX HSTNTXMOX6X  624H ONVOY SPECTRUM, LLC 560   2021-12-04   
936-999 5 Zavalla TX HSTNTXMOX6X  624H ONVOY SPECTRUM, LLC 560   2021-12-04   
936-999 7 Zavalla TX HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2015-03-02   
936-999 9 Zavalla TX HSTNTXJAXGY  516J TON80 COMMUNICATIONS, LLC 560   2021-06-25   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.