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: 820

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-820 A Houston TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2024-07-11   
346-820 0 Houston TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2024-07-11   
346-820 1 Houston TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2024-07-11   
346-820 2 Houston TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2024-07-11   
346-820 3 Houston TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2024-07-11   
346-820 4 Houston TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2024-07-11   
346-820 5 Houston TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2024-07-11   
346-820 6 Houston TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2024-07-11   
346-820 7 Houston TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2024-07-11   
346-820 8 Houston TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2024-07-11   
346-820 9 Houston TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2024-07-11   

Last updated: Sat, 01 Jun 2024 11:59:14 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.