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: IMBHCA11DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
619-423 A Chula Vista CA 9740 PACIFIC BELL 732      
619-424 A Chula Vista CA 9740 PACIFIC BELL 732      
619-429 A Chula Vista CA 9740 PACIFIC BELL 732      
619-575 A Chula Vista CA 9740 PACIFIC BELL 732      
619-628 A Chula Vista CA 9740 PACIFIC BELL 732      
619-628 0 Chula Vista CA 9740 PACIFIC BELL 732      
619-628 1 Chula Vista CA 9740 PACIFIC BELL 732      
619-628 2 Chula Vista CA 9740 PACIFIC BELL 732      
619-628 3 Chula Vista CA 9740 PACIFIC BELL 732      
619-628 4 Chula Vista CA 9740 PACIFIC BELL 732      
619-628 5 Chula Vista CA 9740 PACIFIC BELL 732      
619-628 8 Chula Vista CA 9740 PACIFIC BELL 732      

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

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