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: LSANCARC86Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
213-524 A Los Angeles: DA 01 CA 996H AIRESPRING, INC. 730      
657-438 A Orange CA 996H AIRESPRING, INC. 730      
661-499 A Lancaster CA 996H AIRESPRING, INC. 730      
949-418 A Irvine CA 996H AIRESPRING, INC. 730      

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

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