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: 328

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-328 A Spring TX HSTNTX01MMD  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
346-328 0 Spring TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2018-07-07   
346-328 1 Spring TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2018-07-07   
346-328 2 Spring TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2018-09-01   
346-328 3 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560   2018-11-04   
346-328 4 Spring TX HSTNTXPB6MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 560   2018-10-25   
346-328 5 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560   2018-11-04   
346-328 6 Spring TX HSTNTX01MMD  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2018-05-21   
346-328 7 Spring TX HSTNTX01MMD  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2018-06-04   
346-328 8 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560   2020-09-07   
346-328 9 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560   2018-11-04   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.