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: 439

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
310-439 A Santa Monica: Mar Vista DA CA CLCYCAXG39K  2319 FRONTIER CALIFORNIA INC. 730      
310-439 0 Santa Monica: Mar Vista DA CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
310-439 1 Santa Monica: Mar Vista DA CA SNMNCAXPXJY  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730      
310-439 2 Santa Monica: Mar Vista DA CA SNMNCAXPXJY  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730      
310-439 3 Santa Monica: Mar Vista DA CA LSAJCAWZ7MD  4733 PAETEC COMMUNICATIONS, INC. - CA 730      
310-439 4 Santa Monica: Mar Vista DA CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
310-439 5 Santa Monica: Mar Vista DA CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
310-439 6 Santa Monica: Mar Vista DA CA CLCYCAXG39K  2319 FRONTIER CALIFORNIA INC. 730      
310-439 7 Santa Monica: Mar Vista DA CA LSANCARC80Z  9262 UTILITY TELECOM GROUP, LLC - CA 730      
310-439 8 Santa Monica: Mar Vista DA CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
310-439 9 Santa Monica: Mar Vista DA CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.