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: 265

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
310-265 A Redondo CA RLHLCAXF79L  2319 FRONTIER CALIFORNIA INC. 730      
310-265 0 Redondo CA   2319 FRONTIER CALIFORNIA INC. 730      
310-265 1 Redondo CA   2319 FRONTIER CALIFORNIA INC. 730      
310-265 2 Redondo CA   2319 FRONTIER CALIFORNIA INC. 730      
310-265 3 Redondo CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2006-01-23   
310-265 4 Redondo CA   2319 FRONTIER CALIFORNIA INC. 730      
310-265 5 Redondo CA   2319 FRONTIER CALIFORNIA INC. 730      
310-265 6 Redondo CA   2319 FRONTIER CALIFORNIA INC. 730      
310-265 7 Redondo CA   2319 FRONTIER CALIFORNIA INC. 730      
310-265 8 Redondo CA   2319 FRONTIER CALIFORNIA INC. 730      
310-265 9 Redondo CA   2319 FRONTIER CALIFORNIA INC. 730      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.