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: 818 [Rate centres in NPA 818] [Dial plan for NPA 818]

NXX: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
818-257 A Van Nuys CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
818-257 0 Van Nuys CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
818-257 1 Van Nuys CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
818-257 2 Van Nuys CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
818-257 3 Van Nuys CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
818-257 4 Van Nuys CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
818-257 5 Van Nuys CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2004-04-17   
818-257 6 Van Nuys CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2004-04-17   
818-257 7 Van Nuys CA ANHMCANG2MD  4733 PAETEC COMMUNICATIONS, INC. - CA 730   2004-09-15   
818-257 8 Van Nuys CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2004-10-13   
818-257 9 Van Nuys CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2004-10-13   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.