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: 707 [Rate centres in NPA 707] [Dial plan for NPA 707]

NXX: 275

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
707-275 A Upper Lake CA UPLKCA11RS0  9740 PACIFIC BELL 722      
707-275 0 Upper Lake CA UPLKCA11RS0  9740 PACIFIC BELL 722      
707-275 1 Upper Lake CA UPLKCA11RS0  9740 PACIFIC BELL 722      
707-275 2 Upper Lake CA UPLKCA11RS0  9740 PACIFIC BELL 722      
707-275 3 Upper Lake CA UPLKCA11RS0  9740 PACIFIC BELL 722      
707-275 4 Upper Lake CA SNFCCA01XGX  516C AT&T CORP. 722   2011-05-16   
707-275 5 Upper Lake CA   515J IP HORIZON LLC 722   2003-10-13   
707-275 6 Upper Lake CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2007-04-15   
707-275 8 Upper Lake CA UPLKCA11RS0  9740 PACIFIC BELL 722      
707-275 9 Upper Lake CA UPLKCA11RS0  9740 PACIFIC BELL 722      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.