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: SCRMCA0120Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
916-340 A Sacramento: Main DA CA 700J WAVENATION, LLC 726      
916-340 9 Sacramento: Main DA CA 700J WAVENATION, LLC 726   2025-10-03   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.