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
831-471 2 Santa Cruz CA SNCZCA01DS0  9740 PACIFIC BELL 722      
831-471 3 Santa Cruz CA SNCZCA01DS0  9740 PACIFIC BELL 722      
831-471 4 Santa Cruz CA SNCZCA01DS0  9740 PACIFIC BELL 722      
831-471 5 Santa Cruz CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2010-07-04   
831-471 6 Santa Cruz CA SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2012-10-25   
831-471 7 Santa Cruz CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2013-05-05   
831-471 8 Santa Cruz CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2011-09-30   
831-471 9 Santa Cruz CA SNCZCA01DS0  9740 PACIFIC BELL 722      
831-475 A Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-476 A Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-477 A Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-477 0 Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-477 1 Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-477 2 Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-477 3 Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-477 4 Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-477 5 Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-477 6 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2008-07-06   
831-477 7 Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-477 8 Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-477 9 Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-479 A Santa Cruz CA SNCZCA11DS0  9740 PACIFIC BELL 722      
831-480 A Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
831-484 A Salinas CA SLNSCA13RS0  9740 PACIFIC BELL 736      
831-484 0 Salinas CA SLNSCA13RS0  9740 PACIFIC BELL 736      
831-484 1 Salinas CA SLNSCA13RS0  9740 PACIFIC BELL 736      
831-484 2 Salinas CA SLNSCA13RS0  9740 PACIFIC BELL 736      
831-484 3 Salinas CA SLNSCA01X8Y  5562 METROPCS, INC. 736   2006-06-17   
831-484 4 Salinas CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2014-09-16   
831-484 5 Salinas CA SLNSCA13RS0  9740 PACIFIC BELL 736      
831-484 6 Salinas CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2019-09-13   
831-484 7 Salinas CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2019-09-13   
831-484 8 Salinas CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2016-07-28   
831-484 9 Salinas CA SLNSCA13RS0  9740 PACIFIC BELL 736      
831-498 A Watsonville CA   515J IP HORIZON LLC 722      
831-498 0 Watsonville CA OKLECAZV1MD  5562 METROPCS, INC. 722   2009-08-24   
831-498 1 Watsonville CA SNFCCAMKX5Y  506J TWILIO INTERNATIONAL, INC. 722      
831-498 2 Watsonville CA   515J IP HORIZON LLC 722      
831-498 3 Watsonville CA OKLECAZV1MD  5562 METROPCS, INC. 722   2009-05-18   
831-498 4 Watsonville CA   515J IP HORIZON LLC 722      
831-498 5 Watsonville CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2022-11-25   
831-498 6 Watsonville CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2015-03-02   
831-498 7 Watsonville CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2017-05-19   
831-498 8 Watsonville CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2015-03-02   
831-498 9 Watsonville CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2008-05-08   
831-500 A Salinas CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736      
831-500 0 Salinas CA MTRYCAPMDS0  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2017-05-08   
831-500 1 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2018-01-29   
831-500 2 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2018-01-29   
831-500 3 Salinas CA SLNSCA01X8Y  5562 METROPCS, INC. 736   2018-07-02   
831-500 4 Salinas CA SLNSCA01X8Y  5562 METROPCS, INC. 736   2018-07-02   
831-500 5 Salinas CA MTRYCAPMDS0  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2017-05-08   
831-500 6 Salinas CA SLNSCA01X1Y  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 736   2017-10-20   
831-500 7 Salinas CA SLNSCA01X8Y  5562 METROPCS, INC. 736   2018-04-16   
831-500 8 Salinas CA SLNSCA01X8Y  5562 METROPCS, INC. 736   2018-04-16   
831-500 9 Salinas CA SLNSCA01X8Y  5562 METROPCS, INC. 736   2018-04-16   
831-502 A Santa Cruz CA SNCZCA01DS0  9740 PACIFIC BELL 722      
831-508 A Felton CA   515J IP HORIZON LLC 722      
831-508 0 Felton CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2014-03-28   
831-508 1 Felton CA   515J IP HORIZON LLC 722      
831-508 2 Felton CA   515J IP HORIZON LLC 722      
831-508 3 Felton CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2013-03-16   
831-508 4 Felton CA   515J IP HORIZON LLC 722      
831-508 5 Felton CA SNFCCA01XGX  516C AT&T CORP. 722   2011-09-26   
831-508 6 Felton CA SNVACAHZ0MD  508J CENTURYLINK COMMUNICATIONS, LLC 722   2014-06-09   
831-508 7 Felton CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-03-22   
831-508 8 Felton CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2015-02-23   
831-508 9 Felton CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2015-02-23   
831-512 A Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736      
831-512 0 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2015-03-13   
831-512 1 Salinas CA MTRYCA012MD  981E BANDWIDTH.COM CLEC, LLC - CA 736   2016-07-21   
831-512 2 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2008-03-09   
831-512 3 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2005-12-09   
831-512 4 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2006-01-13   
831-512 5 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2003-10-21   
831-512 6 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2006-02-17   
831-512 7 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2006-02-17   
831-512 8 Salinas CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2006-03-30   
831-512 9 Salinas CA MTRYCA012MD  981E BANDWIDTH.COM CLEC, LLC - CA 736   2010-12-19   
831-515 A Santa Cruz CA SNJSCAYB0MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
831-515 0 Santa Cruz CA SNJSCAYB0MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
831-515 1 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2009-11-09   
831-515 2 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2013-06-13   
831-515 3 Santa Cruz CA HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2006-09-11   
831-515 5 Santa Cruz CA HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2005-06-17   
831-515 6 Santa Cruz CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2011-04-29   
831-515 7 Santa Cruz CA SNFCCA01XGX  516C AT&T CORP. 722   2006-07-07   
831-515 8 Santa Cruz CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2010-02-26   
831-515 9 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2013-06-29   
831-521 A Monterey CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736      
831-524 A Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736      
831-524 0 Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736      
831-524 1 Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736      
831-524 2 Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736      
831-524 3 Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736      
831-524 4 Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2005-07-11   
831-524 5 Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2003-09-21   
831-524 6 Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736      
831-524 7 Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2016-11-10   
831-524 8 Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2014-03-12   

<< 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: ISP Telecom

Like this site? We accept donations via PayPal.