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: 791

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-791 A Humble TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2024-05-19   
346-791 0 Humble TX   903C ONVOY, LLC - TX 560   2024-05-19   
346-791 1 Humble TX   903C ONVOY, LLC - TX 560   2024-05-20   
346-791 2 Humble TX   903C ONVOY, LLC - TX 560   2024-05-20   
346-791 3 Humble TX   6701 AERIAL COMMUNICATIONS, INC. 560   2024-06-24   
346-791 4 Humble TX   903C ONVOY, LLC - TX 560   2024-07-08   
346-791 5 Humble TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2024-08-09   
346-791 6 Humble TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2024-08-09   
346-791 7 Humble TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2024-08-09   
346-791 8 Humble TX   624H ONVOY SPECTRUM, LLC 560   2024-05-20   
346-791 9 Humble TX   624H ONVOY SPECTRUM, LLC 560   2024-05-20   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.