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: CHICCACWAMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-399 4 Chico CA 321J HD CARRIER LLC 724   2020-11-16   
530-774 A Chico CA 321J HD CARRIER LLC 724      
530-774 9 Chico CA 321J HD CARRIER LLC 724   2020-11-16   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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