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: 620

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-620 A Richmond-Rosenberg TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
346-620 0 Richmond-Rosenberg TX HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2023-02-20   
346-620 1 Richmond-Rosenberg TX HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2023-02-20   
346-620 2 Richmond-Rosenberg TX HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2023-02-20   
346-620 3 Richmond-Rosenberg TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2023-02-23   
346-620 4 Richmond-Rosenberg TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2023-02-23   
346-620 5 Richmond-Rosenberg TX HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2023-02-20   
346-620 6 Richmond-Rosenberg TX HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2023-02-20   
346-620 7 Richmond-Rosenberg TX HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2023-03-10   
346-620 8 Richmond-Rosenberg TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2023-02-17   
346-620 9 Richmond-Rosenberg TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2023-02-17   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.