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: 565

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
310-565 A El Segundo CA GRDNCA02KMD  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
310-565 0 El Segundo CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2021-05-24   
310-565 1 El Segundo CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2021-05-24   
310-565 2 El Segundo CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2021-02-24   
310-565 4 El Segundo CA GRDNCA02KMD  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2020-10-12   
310-565 5 El Segundo CA GRDNCA02KMD  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2020-10-12   
310-565 6 El Segundo CA GRDNCA02KMD  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2020-10-12   
310-565 7 El Segundo CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2021-02-24   
310-565 8 El Segundo CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2021-02-24   
310-565 9 El Segundo CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2021-02-15   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.