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: 321

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-321 A Channelview TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
346-321 0 Channelview TX HSTDTXBG8MD  5562 METROPCS, INC. 560   2016-02-27   
346-321 1 Channelview TX HSTDTXBG8MD  5562 METROPCS, INC. 560   2016-02-27   
346-321 2 Channelview TX HSTDTXBG8MD  5562 METROPCS, INC. 560   2016-02-27   
346-321 3 Channelview TX   515J IP HORIZON LLC 560   2016-04-01   
346-321 4 Channelview TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2016-04-04   
346-321 5 Channelview TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2016-04-04   
346-321 6 Channelview TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2016-02-26   
346-321 7 Channelview TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2016-02-26   
346-321 8 Channelview TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2016-02-26   
346-321 9 Channelview TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2016-02-26   

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.