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: 591

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
310-591 A Santa Monica: Mar Vista DA CA RVSDCAMLDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
310-591 0 Santa Monica: Mar Vista DA CA   6664 SPRINT SPECTRUM, L.P. 730   2006-11-15   
310-591 1 Santa Monica: Mar Vista DA CA   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
310-591 2 Santa Monica: Mar Vista DA CA   7262 XO CALIFORNIA, INC. 730   2006-10-21   
310-591 3 Santa Monica: Mar Vista DA CA   624H ONVOY SPECTRUM, LLC 730   2022-04-12   
310-591 4 Santa Monica: Mar Vista DA CA   6664 SPRINT SPECTRUM, L.P. 730   2006-08-12   
310-591 5 Santa Monica: Mar Vista DA CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2006-07-27   
310-591 6 Santa Monica: Mar Vista DA CA   6664 SPRINT SPECTRUM, L.P. 730   2005-10-09   
310-591 7 Santa Monica: Mar Vista DA CA   6664 SPRINT SPECTRUM, L.P. 730   2002-12-12   
310-591 8 Santa Monica: Mar Vista DA CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2005-06-12   
310-591 9 Santa Monica: Mar Vista DA CA   6664 SPRINT SPECTRUM, L.P. 730   2002-12-11   

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.