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: 661 [Rate centres in NPA 661] [Dial plan for NPA 661]

NXX: 680

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-680 A Bakersfield: North DA CA   624H ONVOY SPECTRUM, LLC 734   2025-06-10   
661-680 4 Bakersfield: North DA CA   624H ONVOY SPECTRUM, LLC 734   2025-06-10   
661-680 5 Bakersfield: North DA CA   624H ONVOY SPECTRUM, LLC 734   2025-06-10   
661-680 6 Bakersfield: North DA CA   624H ONVOY SPECTRUM, LLC 734   2025-06-10   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.