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: QZHLCAXF94K

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
661-718 A Lancaster CA 2319 FRONTIER CALIFORNIA INC. 730      
661-718 0 Lancaster CA 2319 FRONTIER CALIFORNIA INC. 730      
661-718 1 Lancaster CA 2319 FRONTIER CALIFORNIA INC. 730      
661-718 2 Lancaster CA 2319 FRONTIER CALIFORNIA INC. 730      
661-718 3 Lancaster CA 2319 FRONTIER CALIFORNIA INC. 730      
661-718 8 Lancaster CA 2319 FRONTIER CALIFORNIA INC. 730      
661-722 A Lancaster CA 2319 FRONTIER CALIFORNIA INC. 730      
661-943 A Lancaster CA 2319 FRONTIER CALIFORNIA INC. 730      

Last updated: Sun, 17 May 2026 03:26:51 UTC

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