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: 784

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-784 A Seabrook TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2024-05-03   
346-784 0 Seabrook TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2024-05-03   
346-784 1 Seabrook TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2024-07-08   
346-784 7 Seabrook TX   515J IP HORIZON LLC 560   2025-03-02   
346-784 8 Seabrook TX   515J IP HORIZON LLC 560   2025-03-02   
346-784 9 Seabrook TX HSTNTXJAXLX  177F PEERLESS NETWORK OF TEXAS, LLC - TX 560   2024-11-22   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.