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: 341 [Rate centres in NPA 341] [Dial plan for NPA 341]

NXX: 400

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
341-400 A Oakland: Fruitvale DA CA SNJUCACL7MD  965H FRACTEL, LLC 722      
341-400 0 Oakland: Fruitvale DA CA SNJUCACL7MD  965H FRACTEL, LLC 722   2020-11-13   
341-400 1 Oakland: Fruitvale DA CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2021-02-07   
341-400 2 Oakland: Fruitvale DA CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2021-02-07   
341-400 3 Oakland: Fruitvale DA CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2021-02-07   
341-400 4 Oakland: Fruitvale DA CA SNJUCACL7MD  965H FRACTEL, LLC 722   2020-11-13   
341-400 5 Oakland: Fruitvale DA CA SNRTCAHFDS0  433E SONIC TELECOM, LLC - CA 722   2021-04-25   
341-400 6 Oakland: Fruitvale DA CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2021-05-06   
341-400 7 Oakland: Fruitvale DA CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2021-03-29   
341-400 8 Oakland: Fruitvale DA CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2021-03-29   
341-400 9 Oakland: Fruitvale DA CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2021-03-29   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.