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
562-222 6 Pico Rivera CA 7421 AT&T LOCAL 730   2004-04-02   
626-208 5 Azusa-Glendora CA 7421 AT&T LOCAL 730   2003-04-19   
626-217 A La Puente CA 7421 AT&T LOCAL 730      
626-217 1 La Puente CA 7421 AT&T LOCAL 730      
626-531 A Monrovia CA 7421 AT&T LOCAL 730      
626-531 9 Monrovia CA 7421 AT&T LOCAL 730      
626-756 A Covina-Baldwin Park CA 7421 AT&T LOCAL 730      
626-756 3 Covina-Baldwin Park CA 7421 AT&T LOCAL 730      
626-756 9 Covina-Baldwin Park CA 7421 AT&T LOCAL 730      
909-297 7 Upland CA 7421 AT&T LOCAL 730   2002-08-20   
909-438 A Chino CA 7421 AT&T LOCAL 730      
909-438 9 Chino CA 7421 AT&T LOCAL 730      
909-575 A Claremont-San Dimas CA 7421 AT&T LOCAL 730      
909-575 5 Claremont-San Dimas CA 7421 AT&T LOCAL 730      
909-718 5 Diamond Bar CA 7421 AT&T LOCAL 730   2007-03-16   
909-907 3 Highland CA 7421 AT&T LOCAL 730   2008-07-18   
951-231 6 Riverside CA 7421 AT&T LOCAL 730   2002-08-21   
951-253 6 Elsinore CA 7421 AT&T LOCAL 730   2005-05-02   
951-665 5 Hemet: San Jacinto DA CA 7421 AT&T LOCAL 730   2002-08-05   

Last updated: Tue, 04 May 2021 15:04:27 UTC

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