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: SNBRCA01DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
626-217 A La Puente CA 7421 AT&T LOCAL 730      
626-531 A Monrovia CA 7421 AT&T LOCAL 730      
626-756 A Covina-Baldwin Park CA 7421 AT&T LOCAL 730      
909-438 A Chino CA 7421 AT&T LOCAL 730      
909-575 A Claremont-San Dimas CA 7421 AT&T LOCAL 730      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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