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: 820 [Rate centres in NPA 820] [Dial plan for NPA 820]

NXX: 223

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
820-223 A Santa Barbara CA SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2024-01-21   
820-223 0 Santa Barbara CA SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2024-01-21   
820-223 1 Santa Barbara CA SNLOCA01X4Y  073H TELNYX LLC 740   2024-01-22   
820-223 2 Santa Barbara CA SNLOCA117MD  732J NUSO, LLC 740   2024-12-07   
820-223 3 Santa Barbara CA SNLOCA117MD  732J NUSO, LLC 740   2024-01-22   
820-223 4 Santa Barbara CA SNLOCA117MD  732J NUSO, LLC 740   2024-01-22   
820-223 5 Santa Barbara CA SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2024-05-23   
820-223 6 Santa Barbara CA SNLOCA117MD  732J NUSO, LLC 740   2024-07-12   
820-223 7 Santa Barbara CA SNLOCA01X1Y  6010 NEW CINGULAR WIRELESS PCS, LLC 740   2024-05-11   
820-223 8 Santa Barbara CA SNBBCAXFXVY  649C ONVOY, LLC - CA 740   2024-02-25   
820-223 9 Santa Barbara CA SNBBCAXFXVY  649C ONVOY, LLC - CA 740   2024-02-25   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.