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: 831 [Rate centres in NPA 831] [Dial plan for NPA 831]

NXX: 356

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-356 A Salinas CA MTRYCAPM6MD  965H FRACTEL, LLC 736      
831-356 0 Salinas CA SLNSCA01XHY  318J COMCAST IP PHONE, LLC 736   2020-09-12   
831-356 1 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2021-02-05   
831-356 2 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2021-02-05   
831-356 3 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2020-07-22   
831-356 4 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2020-07-22   
831-356 5 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2020-06-05   
831-356 6 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2020-06-05   
831-356 7 Salinas CA MTRYCAPM6MD  965H FRACTEL, LLC 736   2020-01-28   
831-356 8 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2020-07-27   
831-356 9 Salinas CA MTRYCAPM6MD  965H FRACTEL, LLC 736   2020-01-28   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.