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
831-223 1 Soledad CA MTRYCA012MD  981E BANDWIDTH.COM CLEC, LLC - CA 736   2010-07-04   
831-223 2 Soledad CA SLNSCA01XGX  9262 UTILITY TELECOM GROUP, LLC - CA 736   2006-06-14   
831-223 3 Soledad CA SLNSCA01X8Y  5562 METROPCS, INC. 736   2005-11-09   
831-223 4 Soledad CA SLNSCA01XXX  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736   2005-07-31   
831-223 5 Soledad CA SLNSCA01X1X  7421 AT&T - LOCAL 736   2006-11-17   
831-223 6 Soledad CA SLNSCA01X8Y  5562 METROPCS, INC. 736   2007-10-08   
831-223 7 Soledad CA SLNSCA01X8Y  5562 METROPCS, INC. 736   2010-09-30   
831-223 8 Soledad CA SLNSCA01X8Y  5562 METROPCS, INC. 736   2008-12-22   
831-223 9 Soledad CA MTRYCA012MD  981E BANDWIDTH.COM CLEC, LLC - CA 736      
831-224 A Monterey CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736      
831-224 0 Monterey CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736      
831-224 2 Monterey CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736      
831-224 3 Monterey CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736      
831-224 4 Monterey CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736      
831-224 5 Monterey CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736      
831-224 6 Monterey CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736      
831-224 7 Monterey CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736      
831-224 8 Monterey CA MTRYCA012MD  981E BANDWIDTH.COM CLEC, LLC - CA 736   2022-10-17   
831-224 9 Monterey CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736      
831-225 A Salinas CA SLNSCA01X7Y  508J CENTURYLINK COMMUNICATIONS, LLC 736      
831-225 0 Salinas CA MTRYCAPMDS0  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2016-01-04   
831-225 1 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2016-03-14   
831-225 2 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2016-03-14   
831-225 3 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2016-03-14   
831-225 4 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2016-04-15   
831-225 5 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2016-08-10   
831-225 6 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2016-08-10   
831-225 7 Salinas CA SLNSCA01X7Y  508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-09-30   
831-225 8 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2016-05-18   
831-225 9 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2016-05-18   
831-226 A Santa Cruz CA SNFCCA01XGX  516C AT&T CORP. 722      
831-226 0 Santa Cruz CA   515J IP HORIZON LLC 722   2015-09-05   
831-226 1 Santa Cruz CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2015-10-26   
831-226 2 Santa Cruz CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2015-08-22   
831-226 3 Santa Cruz CA SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2015-10-23   
831-226 4 Santa Cruz CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2015-10-09   
831-226 5 Santa Cruz CA SNFCCA01XGX  516C AT&T CORP. 722   2015-08-15   
831-226 6 Santa Cruz CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2015-10-03   
831-226 7 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-08-29   
831-226 8 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-08-29   
831-226 9 Santa Cruz CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2015-08-22   
831-227 A Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-227 0 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2003-10-01   
831-227 1 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-227 2 Santa Cruz CA SNJSCARMDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 722   2003-09-16   
831-227 3 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2003-10-01   
831-227 4 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2003-10-01   
831-227 5 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2003-10-01   
831-227 6 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2003-10-01   
831-227 7 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2003-10-01   
831-227 8 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2003-10-01   
831-227 9 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2003-10-01   
831-228 A Watsonville CA WTVLCADV0MD  776C CHARTER FIBERLINK CA-CCO, LLC - CA 722      
831-228 0 Watsonville CA OKLDCAMP1MD  4733 PAETEC COMMUNICATIONS, INC. - CA 722   2015-11-22   
831-228 1 Watsonville CA WTVLCADV0MD  776C CHARTER FIBERLINK CA-CCO, LLC - CA 722   2015-11-21   
831-228 2 Watsonville CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2015-12-06   
831-228 3 Watsonville CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-22   
831-228 4 Watsonville CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-22   
831-228 5 Watsonville CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-15   
831-228 6 Watsonville CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-15   
831-228 7 Watsonville CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-12-30   
831-228 8 Watsonville CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-12-30   
831-228 9 Watsonville CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2016-02-19   
831-229 A Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736      
831-230 A Monterey CA MTRYCAPM0MD  073H TELNYX LLC 736      
831-230 0 Monterey CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2017-04-27   
831-230 1 Monterey CA MTRYCAPM0MD  073H TELNYX LLC 736   2017-02-05   
831-230 2 Monterey CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2021-04-02   
831-230 3 Monterey CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2021-04-02   
831-230 4 Monterey CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2021-04-02   
831-230 5 Monterey CA SLNSCA01XAY  073H TELNYX LLC 736   2023-04-12   
831-230 6 Monterey CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2024-02-22   
831-230 7 Monterey CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2022-12-12   
831-230 8 Monterey CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2022-02-26   
831-230 9 Monterey CA SLNSCA01XAY  073H TELNYX LLC 736   2022-12-23   
831-231 A Greenfield (Monterey) CA SLNSCA01XCY  624H ONVOY SPECTRUM, LLC 736      
831-231 0 Greenfield (Monterey) CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2019-07-05   
831-231 1 Greenfield (Monterey) CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2021-03-05   
831-231 2 Greenfield (Monterey) CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2019-09-13   
831-231 3 Greenfield (Monterey) CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2019-09-13   
831-231 4 Greenfield (Monterey) CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2020-03-02   
831-231 5 Greenfield (Monterey) CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2020-03-02   
831-231 6 Greenfield (Monterey) CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2021-03-05   
831-231 7 Greenfield (Monterey) CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2020-06-08   
831-231 8 Greenfield (Monterey) CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2020-06-08   
831-231 9 Greenfield (Monterey) CA SLNSCA01XCY  624H ONVOY SPECTRUM, LLC 736   2021-06-15   
831-232 A Chualar CA   515J IP HORIZON LLC 736      
831-232 0 Chualar CA MTRYCA012MD  981E BANDWIDTH.COM CLEC, LLC - CA 736   2010-08-28   
831-232 1 Chualar CA   515J IP HORIZON LLC 736      
831-232 2 Chualar CA   515J IP HORIZON LLC 736      
831-232 3 Chualar CA MTRYCAPM0MD  073H TELNYX LLC 736   2018-07-03   
831-232 4 Chualar CA   515J IP HORIZON LLC 736      
831-232 5 Chualar CA SLNSCA01X5Y  516C AT&T CORP. 736   2011-08-05   
831-232 6 Chualar CA MTRYCA012MD  981E BANDWIDTH.COM CLEC, LLC - CA 736   2015-02-23   
831-232 7 Chualar CA MTRYCAPM7MD  516J TON80 COMMUNICATIONS, LLC 736   2022-03-21   
831-232 8 Chualar CA MTRYCA012MD  981E BANDWIDTH.COM CLEC, LLC - CA 736   2015-10-15   
831-232 9 Chualar CA MTRYCAPMDS0  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2016-03-05   
831-233 A Monterey CA SLNSCA01XXX  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-233 0 Monterey CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2006-07-08   
831-233 1 Monterey CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2006-07-08   

<< 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: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.