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.

Switch: NSJNCA11RPA

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-292 A North San Juan CA 9740 PACIFIC BELL 726      
530-292 0 North San Juan CA 9740 PACIFIC BELL 726      
530-292 1 North San Juan CA 9740 PACIFIC BELL 726      
530-292 3 North San Juan CA 9740 PACIFIC BELL 726      
530-292 4 North San Juan CA 9740 PACIFIC BELL 726      

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.