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: 760

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
310-760 A El Segundo CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730      
310-760 0 El Segundo CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730      
310-760 1 El Segundo CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2002-12-10   
310-760 2 El Segundo CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2004-09-16   
310-760 3 El Segundo CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2004-09-16   
310-760 4 El Segundo CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730      
310-760 5 El Segundo CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730      
310-760 6 El Segundo CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2006-03-20   
310-760 7 El Segundo CA   829J PAETEC ITEL, LLC 730   2005-04-23   
310-760 8 El Segundo CA   829J PAETEC ITEL, LLC 730   2005-04-23   
310-760 9 El Segundo CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730      

Last updated: Tue, 15 Jul 2025 18:46:49 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.