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: 309 [Rate centres in NPA 309] [Dial plan for NPA 309]

NXX: 312

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-312 A Kewanee IL KEWNILXDIMD  224C ONVOY, LLC 368      
309-312 0 Kewanee IL   5562 METROPCS, INC. 368   2004-05-02   
309-312 1 Kewanee IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 368   2011-02-13   
309-312 2 Kewanee IL   224C ONVOY, LLC 368   2021-06-13   
309-312 3 Kewanee IL   224C ONVOY, LLC 368   2020-06-15   
309-312 8 Kewanee IL   495J STRATUS NETWORKS 368   2020-08-03   
309-312 9 Kewanee IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 368   2015-11-02   

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.