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.

Switch: SNMNCAXJ31K

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
310-267 A Santa Monica: Santa Monica DA CA 2319 FRONTIER CALIFORNIA INC. 730      
310-314 A Santa Monica: Santa Monica DA CA 2319 FRONTIER CALIFORNIA INC. 730      
310-392 A Santa Monica: Santa Monica DA CA 2319 FRONTIER CALIFORNIA INC. 730      
310-396 A Santa Monica: Santa Monica DA CA 2319 FRONTIER CALIFORNIA INC. 730      
310-399 A Santa Monica: Santa Monica DA CA 2319 FRONTIER CALIFORNIA INC. 730      
310-450 A Santa Monica: Santa Monica DA CA 2319 FRONTIER CALIFORNIA INC. 730      
310-452 A Santa Monica: Santa Monica DA CA 2319 FRONTIER CALIFORNIA INC. 730      
310-581 A Santa Monica: Santa Monica DA CA 2319 FRONTIER CALIFORNIA INC. 730      
310-866 A Santa Monica: Santa Monica DA CA 2319 FRONTIER CALIFORNIA INC. 730      
310-866 4 Santa Monica: Santa Monica DA CA 2319 FRONTIER CALIFORNIA INC. 730      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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