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: 619 [Rate centres in NPA 619] [Dial plan for NPA 619]

NXX: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
619-257 A Chula Vista CA   6529 T-MOBILE USA, INC. 732   2024-03-03   
619-257 0 Chula Vista CA   649C ONVOY, LLC - CA 732      
619-257 1 Chula Vista CA   649C ONVOY, LLC - CA 732      
619-257 2 Chula Vista CA   649C ONVOY, LLC - CA 732      
619-257 3 Chula Vista CA   649C ONVOY, LLC - CA 732      
619-257 4 Chula Vista CA   649C ONVOY, LLC - CA 732      
619-257 5 Chula Vista CA   649C ONVOY, LLC - CA 732      
619-257 6 Chula Vista CA   649C ONVOY, LLC - CA 732      
619-257 7 Chula Vista CA   6529 T-MOBILE USA, INC. 732      
619-257 8 Chula Vista CA   6529 T-MOBILE USA, INC. 732      
619-257 9 Chula Vista CA   6529 T-MOBILE USA, INC. 732      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.