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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: SNFCCA21DS0

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
415-222 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-227 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-227 0 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-227 1 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-227 2 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-227 3 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-227 4 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-227 5 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-227 8 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-227 9 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-247 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-247 0 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-247 1 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-247 2 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-247 3 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-247 4 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-247 5 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-247 6 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-247 7 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-247 8 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-267 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-267 0 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-267 1 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-267 2 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-267 3 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-267 4 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-267 5 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-267 6 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-267 7 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-267 8 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-278 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-278 0 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-278 2 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-278 4 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-278 5 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-278 6 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-278 7 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-278 9 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-344 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-344 0 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-344 1 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-344 2 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-344 3 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-344 4 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-344 5 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-344 6 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-344 7 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-344 9 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-348 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-348 0 San Francisco: Central DA CA 9740 PACIFIC BELL 722      

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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