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.

Switch: SNLOCA01XYY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
820-820 A Santa Barbara CA 824J OPENTACT INC. 740   2026-08-03   
820-820 0 Santa Barbara CA 824J OPENTACT INC. 740   2026-08-03   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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