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: 973

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-973 A Galesburg IL GLBGILXDEMD  6265 UNITED STATES CELLULAR - IL 977      
309-973 0 Galesburg IL   593K MCC TELEPHONY LLC 977   2010-06-13   
309-973 1 Galesburg IL   5562 METROPCS, INC. 977   2011-03-11   
309-973 2 Galesburg IL   1057 BRIGHTSPEED OF ILLINOIS, LLC 977   2012-03-08   
309-973 3 Galesburg IL   5562 METROPCS, INC. 977   2021-10-22   
309-973 4 Galesburg IL   318J COMCAST IP PHONE, LLC 977   2014-07-23   
309-973 5 Galesburg IL   6265 UNITED STATES CELLULAR - IL 977   2013-06-17   
309-973 6 Galesburg IL   6265 UNITED STATES CELLULAR - IL 977   2007-03-29   
309-973 7 Galesburg IL   6529 T-MOBILE USA, INC. 977   2023-02-11   
309-973 8 Galesburg IL   6529 T-MOBILE USA, INC. 977   2023-02-11   
309-973 9 Galesburg IL   6529 T-MOBILE USA, INC. 977   2012-05-30   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.