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: 730

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-730 A Palmdale: Agua Dulce DA CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730      
661-730 6 Palmdale: Agua Dulce DA CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2023-06-15   
661-730 7 Palmdale: Agua Dulce DA CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2023-06-15   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.