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: 359

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-359 A Mackinaw IL MCKNILXDRS2  1015 FRONTIER NORTH, INC. - IL 368      
309-359 0 Mackinaw IL   224C ONVOY, LLC 368   2019-07-15   
309-359 1 Mackinaw IL   224C ONVOY, LLC 368   2019-07-15   
309-359 2 Mackinaw IL   624H ONVOY SPECTRUM, LLC 368   2024-05-13   
309-359 3 Mackinaw IL   1015 FRONTIER NORTH, INC. - IL 368      
309-359 4 Mackinaw IL   1015 FRONTIER NORTH, INC. - IL 368      
309-359 5 Mackinaw IL   1015 FRONTIER NORTH, INC. - IL 368      
309-359 6 Mackinaw IL   1015 FRONTIER NORTH, INC. - IL 368      
309-359 7 Mackinaw IL   984E BANDWIDTH.COM CLEC, LLC - IL 368   2021-06-13   
309-359 8 Mackinaw IL   1015 FRONTIER NORTH, INC. - IL 368      
309-359 9 Mackinaw IL   1015 FRONTIER NORTH, INC. - IL 368      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.