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]

<< 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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-673 8 Hollister CA   6010 NEW CINGULAR WIRELESS PCS, LLC 736   2016-04-14   
831-673 9 Hollister CA   6010 NEW CINGULAR WIRELESS PCS, LLC 736   2014-10-24   
831-674 A Greenfield (Monterey) CA GNFDCA11RS0  9740 PACIFIC BELL 736      
831-674 0 Greenfield (Monterey) CA   9740 PACIFIC BELL 736      
831-674 1 Greenfield (Monterey) CA   9740 PACIFIC BELL 736      
831-674 2 Greenfield (Monterey) CA   9740 PACIFIC BELL 736      
831-674 3 Greenfield (Monterey) CA   9740 PACIFIC BELL 736      
831-674 4 Greenfield (Monterey) CA   649C ONVOY, LLC - CA 736   2017-04-27   
831-674 5 Greenfield (Monterey) CA   9740 PACIFIC BELL 736      
831-674 6 Greenfield (Monterey) CA   9740 PACIFIC BELL 736      
831-674 7 Greenfield (Monterey) CA   776C CHARTER FIBERLINK CA-CCO, LLC - CA 736   2017-11-04   
831-674 8 Greenfield (Monterey) CA   9740 PACIFIC BELL 736      
831-674 9 Greenfield (Monterey) CA   9740 PACIFIC BELL 736      
831-675 A Gonzales CA GNZLCA11RS0  9740 PACIFIC BELL 736      
831-675 0 Gonzales CA   9740 PACIFIC BELL 736      
831-675 1 Gonzales CA   9740 PACIFIC BELL 736      
831-675 2 Gonzales CA   9740 PACIFIC BELL 736      
831-675 3 Gonzales CA   9740 PACIFIC BELL 736      
831-675 4 Gonzales CA   7421 AT&T - LOCAL 736   2013-05-01   
831-675 5 Gonzales CA   776C CHARTER FIBERLINK CA-CCO, LLC - CA 736   2017-11-04   
831-675 6 Gonzales CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736   2005-07-31   
831-675 7 Gonzales CA   145J TERRA NOVA TELECOM INC. 736   2021-01-12   
831-675 8 Gonzales CA   9740 PACIFIC BELL 736      
831-675 9 Gonzales CA   145J TERRA NOVA TELECOM INC. 736   2022-04-12   
831-676 A Salinas CA SLNSCA01X1X  7421 AT&T - LOCAL 736      
831-676 0 Salinas CA   318J COMCAST IP PHONE, LLC 736   2011-09-26   
831-676 1 Salinas CA   5562 METROPCS, INC. 736   2011-09-22   
831-676 2 Salinas CA   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 736   2011-07-25   
831-676 3 Salinas CA   318J COMCAST IP PHONE, LLC 736   2006-04-13   
831-676 4 Salinas CA   5562 METROPCS, INC. 736   2011-09-25   
831-676 5 Salinas CA   6010 NEW CINGULAR WIRELESS PCS, LLC 736   2006-06-04   
831-676 6 Salinas CA   6010 NEW CINGULAR WIRELESS PCS, LLC 736   2006-06-04   
831-676 7 Salinas CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2007-03-28   
831-676 8 Salinas CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2007-05-28   
831-676 9 Salinas CA   7421 AT&T - LOCAL 736      
831-677 A Soledad CA SLNSCA011KD  7379 MATRIX TELECOM, LLC. S/I/I TNCI - CA 736      
831-677 0 Soledad CA   6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-05-03   
831-677 1 Soledad CA   6010 NEW CINGULAR WIRELESS PCS, LLC 736   2021-09-26   
831-677 2 Soledad CA   649C ONVOY, LLC - CA 736      
831-677 3 Soledad CA   649C ONVOY, LLC - CA 736      
831-677 4 Soledad CA   649C ONVOY, LLC - CA 736   2022-03-04   
831-677 5 Soledad CA   649C ONVOY, LLC - CA 736   2021-07-30   
831-677 6 Soledad CA   981E BANDWIDTH.COM CLEC, LLC - CA 736   2014-03-28   
831-677 7 Soledad CA   965H FRACTEL, LLC 736   2020-11-29   
831-677 8 Soledad CA   6010 NEW CINGULAR WIRELESS PCS, LLC 736   2020-12-26   
831-677 9 Soledad CA   6010 NEW CINGULAR WIRELESS PCS, LLC 736   2021-04-01   
831-678 A Soledad CA SLDDCA11RS0  9740 PACIFIC BELL 736      
831-679 A Chualar CA CHLRCA11RS0  9740 PACIFIC BELL 736      
831-679 0 Chualar CA   9740 PACIFIC BELL 736      
831-679 1 Chualar CA   9740 PACIFIC BELL 736      
831-679 2 Chualar CA   9740 PACIFIC BELL 736      
831-679 3 Chualar CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736   2005-07-26   
831-679 4 Chualar CA   649C ONVOY, LLC - CA 736   2017-04-27   
831-679 7 Chualar CA   9262 UTILITY TELECOM GROUP, LLC - CA 736   2006-06-14   
831-679 8 Chualar CA   145J TERRA NOVA TELECOM INC. 736   2021-01-12   
831-679 9 Chualar CA   776C CHARTER FIBERLINK CA-CCO, LLC - CA 736   2018-09-11   
831-682 A Salinas CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736      
831-684 A Aptos CA APTSCA12DS0  9740 PACIFIC BELL 722      
831-684 0 Aptos CA   9740 PACIFIC BELL 722      
831-684 1 Aptos CA   9740 PACIFIC BELL 722      
831-684 2 Aptos CA   9740 PACIFIC BELL 722      
831-684 3 Aptos CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2020-09-09   
831-684 4 Aptos CA   9740 PACIFIC BELL 722      
831-684 5 Aptos CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2020-09-09   
831-684 6 Aptos CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2020-09-09   
831-684 7 Aptos CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2011-12-05   
831-684 8 Aptos CA   649C ONVOY, LLC - CA 722   2021-07-30   
831-685 A Aptos CA APTSCA12DS0  9740 PACIFIC BELL 722      
831-687 A Aptos CA APTSCA12DS0  9740 PACIFIC BELL 722      
831-687 0 Aptos CA   9740 PACIFIC BELL 722      
831-687 1 Aptos CA   9740 PACIFIC BELL 722      
831-687 2 Aptos CA   9262 UTILITY TELECOM GROUP, LLC - CA 722   2006-06-14   
831-687 4 Aptos CA   649C ONVOY, LLC - CA 722   2016-01-06   
831-687 5 Aptos CA   9740 PACIFIC BELL 722      
831-687 7 Aptos CA   433E SONIC TELECOM, LLC - CA 722   2012-12-22   
831-687 8 Aptos CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2011-07-29   
831-687 9 Aptos CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2011-07-29   
831-688 A Aptos CA APTSCA12DS0  9740 PACIFIC BELL 722      
831-689 A Aptos CA APTSCA12DS0  9740 PACIFIC BELL 722      
831-689 0 Aptos CA   9740 PACIFIC BELL 722      
831-689 2 Aptos CA   9262 UTILITY TELECOM GROUP, LLC - CA 722      
831-689 3 Aptos CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2020-09-09   
831-689 4 Aptos CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2020-09-09   
831-689 5 Aptos CA   145J TERRA NOVA TELECOM INC. 722   2024-05-26   
831-689 6 Aptos CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2020-09-09   
831-689 7 Aptos CA   649C ONVOY, LLC - CA 722   2009-12-13   
831-689 8 Aptos CA   9740 PACIFIC BELL 722      
831-689 9 Aptos CA   9740 PACIFIC BELL 722      
831-693 A Idria CA PNCLCAXFDS0  2346 PINNACLES TEL. CO. 736      
831-699 A Felton CA SNJUCACL7MD  965H FRACTEL, LLC 722      
831-699 0 Felton CA   649C ONVOY, LLC - CA 722   2021-07-30   
831-699 1 Felton CA   649C ONVOY, LLC - CA 722   2021-07-30   
831-699 3 Felton CA   624H ONVOY SPECTRUM, LLC 722   2021-12-10   
831-699 4 Felton CA   624H ONVOY SPECTRUM, LLC 722   2021-12-10   
831-699 6 Felton CA   624H ONVOY SPECTRUM, LLC 722   2021-07-23   
831-699 8 Felton CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2021-09-24   
831-699 9 Felton CA   965H FRACTEL, LLC 722   2021-02-20   
831-703 A Boulder Creek CA OKLDCAEBDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
831-703 0 Boulder Creek CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2016-12-09   
831-703 1 Boulder Creek CA   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      

<< 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 >>

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.