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: 283 [Rate centres in NPA 283] [Dial plan for NPA 283]

NXX: 333

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
283-333 A Cincinnati OH CNCNOHWSX9Z  765H WIDE VOICE, LLC - OH 922   2024-01-20   
283-333 0 Cincinnati OH   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 922   2024-01-26   
283-333 1 Cincinnati OH   464C ONVOY, LLC - OH 922   2024-02-24   
283-333 2 Cincinnati OH   464C ONVOY, LLC - OH 922   2024-02-24   
283-333 3 Cincinnati OH   765H WIDE VOICE, LLC - OH 922   2024-01-20   
283-333 4 Cincinnati OH   321J HD CARRIER LLC 922   2024-01-20   
283-333 5 Cincinnati OH   321J HD CARRIER LLC 922   2024-01-20   
283-333 6 Cincinnati OH   490J DISH WIRELESS, LLC 922   2024-03-11   
283-333 7 Cincinnati OH   490J DISH WIRELESS, LLC 922   2024-06-08   
283-333 8 Cincinnati OH   464C ONVOY, LLC - OH 922   2024-03-28   
283-333 9 Cincinnati OH   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 922   2025-10-25   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.