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: 925

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-925 A Houston TX   903C ONVOY, LLC - TX 560   2026-05-31   
346-925 0 Houston TX   903C ONVOY, LLC - TX 560   2026-05-31   
346-925 1 Houston TX   903C ONVOY, LLC - TX 560   2026-05-31   
346-925 2 Houston TX   903C ONVOY, LLC - TX 560   2026-05-31   
346-925 3 Houston TX   903C ONVOY, LLC - TX 560   2026-05-31   
346-925 4 Houston TX   903C ONVOY, LLC - TX 560   2026-05-31   
346-925 5 Houston TX   903C ONVOY, LLC - TX 560   2026-05-31   
346-925 6 Houston TX   903C ONVOY, LLC - TX 560   2026-05-31   
346-925 7 Houston TX   903C ONVOY, LLC - TX 560   2026-05-31   
346-925 8 Houston TX   903C ONVOY, LLC - TX 560   2026-05-31   
346-925 9 Houston TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2026-06-24   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.