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.

NPA: 650 [Rate centres in NPA 650] [Dial plan for NPA 650]

NXX: 287

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-287 A San Mateo CA SNMTCA11DS0  9740 PACIFIC BELL 722      
650-287 0 San Mateo CA SNMTCA11DS0  9740 PACIFIC BELL 722      
650-287 1 San Mateo CA SNMTCA11DS0  9740 PACIFIC BELL 722      
650-287 2 San Mateo CA SNMTCA11DS0  9740 PACIFIC BELL 722      
650-287 3 San Mateo CA SNMTCA11DS0  9740 PACIFIC BELL 722      
650-287 4 San Mateo CA SNMTCA11DS0  9740 PACIFIC BELL 722      
650-287 5 San Mateo CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722   2019-03-22   
650-287 6 San Mateo CA SNMTCA11DS0  9740 PACIFIC BELL 722      
650-287 7 San Mateo CA SNMTCA11DS0  9740 PACIFIC BELL 722      
650-287 8 San Mateo CA SNMTCA11DS0  9740 PACIFIC BELL 722      
650-287 9 San Mateo CA SNMTCA11DS0  9740 PACIFIC BELL 722      

Last updated: Sun, 07 Feb 2021 01:52:50 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.