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: 431

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-431 A San Mateo CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
650-431 0 San Mateo CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-01-13   
650-431 1 San Mateo CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-01-13   
650-431 2 San Mateo CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-22   
650-431 3 San Mateo CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-22   
650-431 4 San Mateo CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2016-02-19   
650-431 5 San Mateo CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2016-02-19   
650-431 6 San Mateo CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722   2016-03-31   
650-431 7 San Mateo CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-04-24   
650-431 8 San Mateo CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722   2015-11-07   
650-431 9 San Mateo CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722   2015-11-07   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.