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: SNYMCAXF92F

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
951-242 A Moreno CA 2319 FRONTIER CALIFORNIA INC. 730      
951-243 A Moreno CA 2319 FRONTIER CALIFORNIA INC. 730      
951-247 A Moreno CA 2319 FRONTIER CALIFORNIA INC. 730      
951-485 A Moreno CA 2319 FRONTIER CALIFORNIA INC. 730      
951-486 A Moreno CA 2319 FRONTIER CALIFORNIA INC. 730      
951-488 A Moreno CA 2319 FRONTIER CALIFORNIA INC. 730      
951-601 A Moreno CA 2319 FRONTIER CALIFORNIA INC. 730      
951-924 A Moreno CA 2319 FRONTIER CALIFORNIA INC. 730      

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

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