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: 421

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-421 A Arcola TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
346-421 0 Arcola TX   903C ONVOY, LLC - TX 560   2021-04-12   
346-421 1 Arcola TX   903C ONVOY, LLC - TX 560   2021-04-12   
346-421 2 Arcola TX   624H ONVOY SPECTRUM, LLC 560   2025-01-03   
346-421 3 Arcola TX   903C ONVOY, LLC - TX 560   2021-04-12   
346-421 4 Arcola TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2022-02-27   
346-421 5 Arcola TX   903C ONVOY, LLC - TX 560   2021-07-02   
346-421 6 Arcola TX   903C ONVOY, LLC - TX 560   2021-07-02   
346-421 7 Arcola TX   177F PEERLESS NETWORK OF TEXAS, LLC - TX 560   2021-06-25   
346-421 8 Arcola TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2020-04-12   
346-421 9 Arcola TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2020-04-12   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.