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: 999

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
283-999 A Little Miami OH CNCNOHWSX9Z  765H WIDE VOICE, LLC - OH 922      
283-999 1 Little Miami OH   197D VONAGE AMERICA LLC 922   2023-12-18   
283-999 2 Little Miami OH   464C ONVOY, LLC - OH 922   2024-02-22   
283-999 3 Little Miami OH   321J HD CARRIER LLC 922   2023-12-14   
283-999 9 Little Miami OH   765H WIDE VOICE, LLC - OH 922   2023-12-14   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.