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: SIMICA11DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
805-204 A Oxnard CA 7480 PACIFIC BELL (COMPETITIVE) 730      
805-214 A Newbury Park CA 7480 PACIFIC BELL (COMPETITIVE) 730      
805-306 A Simi Valley CA 9740 PACIFIC BELL 730      
805-380 A Conejo CA 7480 PACIFIC BELL (COMPETITIVE) 730      
805-418 A Thousand Oaks CA 7480 PACIFIC BELL (COMPETITIVE) 730      
805-437 A Camarillo CA 7480 PACIFIC BELL (COMPETITIVE) 730      
805-520 A Simi Valley CA 9740 PACIFIC BELL 730      
805-522 A Simi Valley CA 9740 PACIFIC BELL 730      
805-526 A Simi Valley CA 9740 PACIFIC BELL 730      
805-527 A Simi Valley CA 9740 PACIFIC BELL 730      
805-577 A Simi Valley CA 9740 PACIFIC BELL 730      
805-578 A Simi Valley CA 9740 PACIFIC BELL 730      
805-579 A Simi Valley CA 9740 PACIFIC BELL 730      
805-581 A Simi Valley CA 9740 PACIFIC BELL 730      
805-582 A Simi Valley CA 9740 PACIFIC BELL 730      
805-583 A Simi Valley CA 9740 PACIFIC BELL 730      
805-584 A Simi Valley CA 9740 PACIFIC BELL 730      
805-874 A Point Mugu CA 7480 PACIFIC BELL (COMPETITIVE) 730      
805-955 A Simi Valley CA 9740 PACIFIC BELL 730      
805-973 A El Rio CA 7480 PACIFIC BELL (COMPETITIVE) 730      

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

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