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: WLMGCA01DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
310-233 A San Pedro CA 9740 PACIFIC BELL 730      
310-513 A San Pedro CA 9740 PACIFIC BELL 730      
310-518 A San Pedro CA 9740 PACIFIC BELL 730      
310-522 A San Pedro CA 9740 PACIFIC BELL 730      
310-549 A San Pedro CA 9740 PACIFIC BELL 730      
310-816 A San Pedro CA 9740 PACIFIC BELL 730      
310-830 A San Pedro CA 9740 PACIFIC BELL 730      
310-834 A San Pedro CA 9740 PACIFIC BELL 730      
310-835 A San Pedro CA 9740 PACIFIC BELL 730      
310-847 A San Pedro CA 9740 PACIFIC BELL 730      
310-952 A San Pedro CA 9740 PACIFIC BELL 730      
323-775 A Los Angeles: DA 06 CA 9740 PACIFIC BELL 730      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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