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: SNLNCA11DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
510-258 A Hayward CA 9740 PACIFIC BELL 722      
510-276 A Hayward CA 9740 PACIFIC BELL 722      
510-278 A Hayward CA 9740 PACIFIC BELL 722      
510-297 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722      
510-317 A Hayward CA 9740 PACIFIC BELL 722      
510-346 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722      
510-347 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722      
510-351 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722      
510-352 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722      
510-357 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722      
510-454 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722   2012-12-30   
510-481 A Hayward CA 9740 PACIFIC BELL 722      
510-483 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722      
510-614 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722      
510-618 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722      
510-667 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722      
510-678 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722      
510-895 A Oakland: Trinidad DA CA 9740 PACIFIC BELL 722      

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

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