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: 529

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-529 A Woodside CA MNPKCA11DS0  9740 PACIFIC BELL 722      
650-529 0 Woodside CA   9740 PACIFIC BELL 722      
650-529 1 Woodside CA   9740 PACIFIC BELL 722      
650-529 2 Woodside CA   9740 PACIFIC BELL 722      
650-529 3 Woodside CA   9740 PACIFIC BELL 722      
650-529 4 Woodside CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2004-04-10   
650-529 5 Woodside CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2014-04-13   
650-529 6 Woodside CA   649C ONVOY, LLC - CA 722   2020-08-29   
650-529 7 Woodside CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2019-10-04   
650-529 8 Woodside CA   9740 PACIFIC BELL 722      
650-529 9 Woodside CA   9740 PACIFIC BELL 722      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.