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: SPLVCAXFDS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
818-221 A San Fernando: Sepulveda DA CA 2319 FRONTIER CALIFORNIA INC. 730      
818-270 A San Fernando: San Fernando DA CA 2319 FRONTIER CALIFORNIA INC. 730      
818-271 A San Fernando: Granada Hills DA CA 2319 FRONTIER CALIFORNIA INC. 730      
818-272 A San Fernando: Pacoima DA CA 2319 FRONTIER CALIFORNIA INC. 730      
818-273 A Sunland-Tujunga CA 2319 FRONTIER CALIFORNIA INC. 730      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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