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
831-319 3 Watsonville CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2012-05-22   
831-319 4 Watsonville CA WTVLCADV1MD  792K CHARTER IP ENABLED SERVICES, LLC 722   2012-08-15   
831-319 5 Watsonville CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-06-13   
831-319 6 Watsonville CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2014-11-08   
831-319 7 Watsonville CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2013-12-16   
831-319 8 Watsonville CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2011-08-18   
831-319 9 Watsonville CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2015-09-16   
831-320 A Salinas CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736      
831-321 A Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-321 0 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-21   
831-321 1 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-21   
831-321 2 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-321 3 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-321 4 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-321 5 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-321 6 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-321 7 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-321 8 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-321 9 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-322 A Watsonville CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2024-01-21   
831-322 0 Watsonville CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-05-05   
831-322 1 Watsonville CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-04-20   
831-322 2 Watsonville CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-05-05   
831-322 3 Watsonville CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-07-08   
831-322 4 Watsonville CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-07-28   
831-322 5 Watsonville CA SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2016-10-10   
831-322 6 Watsonville CA SNFCCA21XOZ  321J HD CARRIER LLC 722   2016-10-22   
831-322 7 Watsonville CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2016-07-15   
831-322 8 Watsonville CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2016-07-07   
831-322 9 Watsonville CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2016-05-02   
831-324 A Monterey CA SLNSCA01XHY  394L COMCAST PHONE OF CALIFORNIA, LLC 736      
831-324 0 Monterey CA SLNSCA01XHY  394L COMCAST PHONE OF CALIFORNIA, LLC 736   2006-04-07   
831-324 1 Monterey CA MTRYCAPMDS0  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2014-11-08   
831-324 2 Monterey CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2015-03-17   
831-324 3 Monterey CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2010-08-07   
831-324 4 Monterey CA SLNSCA01XHY  394L COMCAST PHONE OF CALIFORNIA, LLC 736   2008-03-21   
831-324 5 Monterey CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2014-08-22   
831-324 6 Monterey CA SLNSCA01XQY  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 736   2012-01-12   
831-324 7 Monterey CA MTRYCAPMAMD  490J BOOST SUBSCRIBERCO L.L.C. 736   2023-11-08   
831-324 8 Monterey CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2015-03-17   
831-324 9 Monterey CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2016-05-14   
831-325 A Santa Cruz CA OKLECAZV1MD  5562 METROPCS, INC. 722      
831-325 0 Santa Cruz CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2008-03-14   
831-325 1 Santa Cruz CA OKLECAZV1MD  5562 METROPCS, INC. 722      
831-325 2 Santa Cruz CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2011-04-29   
831-325 3 Santa Cruz CA OKLECAZV1MD  5562 METROPCS, INC. 722      
831-325 4 Santa Cruz CA OKLECAZV1MD  5562 METROPCS, INC. 722      
831-325 5 Santa Cruz CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
831-325 6 Santa Cruz CA OKLECAZV1MD  5562 METROPCS, INC. 722      
831-325 7 Santa Cruz CA OKLECAZV1MD  5562 METROPCS, INC. 722      
831-325 8 Santa Cruz CA OKLECAZV1MD  5562 METROPCS, INC. 722      
831-325 9 Santa Cruz CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
831-326 A Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-326 0 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-326 1 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-326 2 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-326 3 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-326 4 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-326 5 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-326 6 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-326 7 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-326 8 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-326 9 Salinas CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-01-20   
831-327 A Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-02-23   
831-327 0 Hollister CA MTRYCA012MD  981E BANDWIDTH.COM CLEC, LLC - CA 736   2026-06-08   
831-327 1 Hollister CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2025-05-25   
831-327 2 Hollister CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2025-10-24   
831-327 3 Hollister CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2025-08-08   
831-327 4 Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-11-28   
831-327 5 Hollister CA   649C ONVOY, LLC - CA 736   2026-09-27   
831-327 6 Hollister CA   649C ONVOY, LLC - CA 736   2026-09-27   
831-327 7 Hollister CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2026-01-02   
831-327 8 Hollister CA SLNSCA01X8Y  6529 T-MOBILE USA, INC. 736   2025-02-24   
831-327 9 Hollister CA SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2025-02-23   
831-328 A Salinas CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2025-05-04   
831-328 0 Salinas CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2025-05-04   
831-328 1 Salinas CA SLNSCA01XCY  624H ONVOY SPECTRUM, LLC 736   2025-05-16   
831-328 2 Salinas CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2025-05-05   
831-328 3 Salinas CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2025-06-23   
831-328 4 Salinas CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2026-07-04   
831-328 5 Salinas CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2026-09-10   
831-328 6 Salinas CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2025-11-09   
831-328 7 Salinas CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2026-04-05   
831-328 8 Salinas CA SLNSCA01XCY  624H ONVOY SPECTRUM, LLC 736   2025-05-16   
831-328 9 Salinas CA SLNSCA01XCY  624H ONVOY SPECTRUM, LLC 736   2025-05-16   
831-329 A Salinas CA SLNTCAPS6MD  478J NUSO, LLC 736   2025-06-12   
831-329 0 Salinas CA SLNSCA01XAY  073H TELNYX LLC 736   2025-09-11   
831-329 1 Salinas CA SLNTCAPS6MD  478J NUSO, LLC 736   2025-06-12   
831-329 2 Salinas CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2026-06-14   
831-329 3 Salinas CA   649C ONVOY, LLC - CA 736   2026-08-17   
831-329 4 Salinas CA   649C ONVOY, LLC - CA 736   2026-08-17   
831-329 5 Salinas CA   649C ONVOY, LLC - CA 736   2026-08-17   
831-329 6 Salinas CA   649C ONVOY, LLC - CA 736   2026-08-17   
831-329 7 Salinas CA   981E BANDWIDTH.COM CLEC, LLC - CA 736   2026-08-08   
831-329 8 Salinas CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2025-06-30   
831-329 9 Salinas CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2025-08-11   
831-330 A Carmel CA SLNSCA01XCY  624H ONVOY SPECTRUM, LLC 736   2024-02-09   
831-330 0 Carmel CA SLNSCA01XCY  624H ONVOY SPECTRUM, LLC 736   2024-02-09   
831-330 1 Carmel CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2024-02-26   
831-330 2 Carmel CA SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2024-11-08   

<< 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: Tue, 29 Sep 2026 03:00:13 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.