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: 310 [Rate centres in NPA 310] [Dial plan for NPA 310]

NXX: 557

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
310-557 A Beverly Hills CA WLANCA01DS0  9740 PACIFIC BELL 730      
310-557 0 Beverly Hills CA WLANCA01DS0  9740 PACIFIC BELL 730      
310-557 1 Beverly Hills CA WLANCA01DS0  9740 PACIFIC BELL 730      
310-557 2 Beverly Hills CA WLANCA01DS0  9740 PACIFIC BELL 730      
310-557 3 Beverly Hills CA WLANCA01DS0  9740 PACIFIC BELL 730      
310-557 4 Beverly Hills CA WLANCA01DS0  9740 PACIFIC BELL 730      
310-557 5 Beverly Hills CA WLANCA01DS0  9740 PACIFIC BELL 730      
310-557 6 Beverly Hills CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2005-07-07   
310-557 7 Beverly Hills CA WLANCA01DS0  9740 PACIFIC BELL 730      
310-557 8 Beverly Hills CA WLANCA01DS0  9740 PACIFIC BELL 730      
310-557 9 Beverly Hills CA WLANCA01DS0  9740 PACIFIC BELL 730      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.