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: BKFHCAON4MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
661-596 A Bakersfield: Main DA CA 732J NUSO, LLC 734      
661-596 1 Bakersfield: Main DA CA 732J NUSO, LLC 734   2023-02-19   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.