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: 380 [Rate centres in NPA 380] [Dial plan for NPA 380]

NXX: 204

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
380-204 A Dublin OH CLMDOH44FMD  197D VONAGE AMERICA LLC 324      
380-204 0 Dublin OH   197D VONAGE AMERICA LLC 324   2018-12-23   
380-204 1 Dublin OH   197D VONAGE AMERICA LLC 324   2018-12-23   
380-204 2 Dublin OH   197D VONAGE AMERICA LLC 324   2018-12-23   
380-204 3 Dublin OH   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324   2018-12-24   
380-204 4 Dublin OH   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324   2018-12-24   
380-204 5 Dublin OH   284F PEERLESS NETWORK OF OHIO, LLC - OH 324   2019-05-23   
380-204 6 Dublin OH   001F BANDWIDTH.COM CLEC, LLC - OH 324   2019-06-06   
380-204 7 Dublin OH   001F BANDWIDTH.COM CLEC, LLC - OH 324   2019-07-12   
380-204 8 Dublin OH   073H TELNYX LLC 324   2019-03-18   
380-204 9 Dublin OH   464C ONVOY, LLC - OH 324   2020-04-19   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.