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.
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Switch: HRBHCAXA37K

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
310-318 A Redondo CA 2319 FRONTIER CALIFORNIA INC. 730      
310-372 A Redondo CA 2319 FRONTIER CALIFORNIA INC. 730      
310-374 A Redondo CA 2319 FRONTIER CALIFORNIA INC. 730      
310-376 A Redondo CA 2319 FRONTIER CALIFORNIA INC. 730      
310-379 A Redondo CA 2319 FRONTIER CALIFORNIA INC. 730      
310-406 A Redondo CA 2319 FRONTIER CALIFORNIA INC. 730      
310-798 A Redondo CA 2319 FRONTIER CALIFORNIA INC. 730      
310-937 A Redondo CA 2319 FRONTIER CALIFORNIA INC. 730      

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

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