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: 217 [Rate centres in NPA 217] [Dial plan for NPA 217]

NXX: 375

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
217-375 A East Lynn IL ELYNILXCRS0  1000 FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 370      
217-375 1 East Lynn IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 370   2015-10-30   
217-375 2 East Lynn IL   224C ONVOY, LLC 370   2020-01-11   
217-375 3 East Lynn IL   224C ONVOY, LLC 370   2020-01-11   
217-375 4 East Lynn IL   1000 FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 370      
217-375 5 East Lynn IL   224C ONVOY, LLC 370   2018-10-06   
217-375 6 East Lynn IL   224C ONVOY, LLC 370   2020-01-11   
217-375 7 East Lynn IL   508J CENTURYLINK COMMUNICATIONS, LLC 370   2016-06-11   
217-375 8 East Lynn IL   224C ONVOY, LLC 370   2019-07-05   
217-375 9 East Lynn IL   224C ONVOY, LLC 370   2019-07-05   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.