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]

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-999 2 Palo Alto CA SNJSCA02DS4  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2011-10-24   
650-999 3 Palo Alto CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-07-05   
650-999 4 Palo Alto CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-07-05   
650-999 5 Palo Alto CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-07-05   
650-999 6 Palo Alto CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-08-02   
650-999 7 Palo Alto CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2011-11-25   
650-999 8 Palo Alto CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-08-02   
650-999 9 Palo Alto CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2011-10-21   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.