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: 350 [Rate centres in NPA 350] [Dial plan for NPA 350]

NXX: 999

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
350-999 A Gustine CA SKTNCACZ7MD  145J TERRA NOVA TELECOM INC. 738      
350-999 0 Gustine CA SKTNCACZ4MD  939H COMMIO, LLC 738      
350-999 1 Gustine CA SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738      
350-999 7 Gustine CA SKTNCA01XPZ  318J COMCAST IP PHONE, LLC 738      
350-999 8 Gustine CA SKTNCACZDS2  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 738      
350-999 9 Gustine CA SKTNCACZ7MD  145J TERRA NOVA TELECOM INC. 738      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.