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: 563 [Rate centres in NPA 563] [Dial plan for NPA 563]

NXX: 278

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
563-278 A Clinton IA DVNPIADTGMD  221F ONVOY, LLC - IA 634      
563-278 0 Clinton IA   221F ONVOY, LLC - IA 634   2020-10-06   
563-278 1 Clinton IA   221F ONVOY, LLC - IA 634   2020-10-06   
563-278 2 Clinton IA   221F ONVOY, LLC - IA 634   2020-01-27   
563-278 3 Clinton IA   221F ONVOY, LLC - IA 634   2020-05-15   
563-278 4 Clinton IA   695G IMON COMMUNICATIONS, LLC - IA 634   2024-10-06   
563-278 5 Clinton IA   221F ONVOY, LLC - IA 634   2019-10-24   
563-278 6 Clinton IA   221F ONVOY, LLC - IA 634   2019-10-24   
563-278 7 Clinton IA   985E BANDWIDTH.COM CLEC, LLC - IA 634   2021-11-26   
563-278 8 Clinton IA   221F ONVOY, LLC - IA 634   2021-03-24   
563-278 9 Clinton IA   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 634   2019-10-25   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.