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: 658

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
310-658 A El Segundo CA IRVECAJTDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
310-658 0 El Segundo CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2002-12-10   
310-658 1 El Segundo CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2006-10-10   
310-658 2 El Segundo CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2006-10-10   
310-658 3 El Segundo CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2006-01-23   
310-658 4 El Segundo CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2006-01-23   
310-658 5 El Segundo CA IRVECAJTDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
310-658 6 El Segundo CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2007-03-09   
310-658 7 El Segundo CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2004-07-04   
310-658 8 El Segundo CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2002-12-10   
310-658 9 El Segundo CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2004-08-29   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.