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: LACRCA11DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
818-236 A La Crescenta CA 9740 PACIFIC BELL 730      
818-248 A La Crescenta CA 9740 PACIFIC BELL 730      
818-249 A La Crescenta CA 9740 PACIFIC BELL 730      
818-541 A La Crescenta CA 9740 PACIFIC BELL 730      
818-542 A La Crescenta CA 9740 PACIFIC BELL 730      
818-790 A Pasadena: La Cañada DA CA 9740 PACIFIC BELL 730      
818-949 A Pasadena: La Cañada DA CA 9740 PACIFIC BELL 730      
818-952 A Pasadena: La Cañada DA CA 9740 PACIFIC BELL 730      
818-957 A La Crescenta CA 9740 PACIFIC BELL 730      

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

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