Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 309 [Rate centres in NPA 309] [Dial plan for NPA 309]

NXX: 617

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-617 A Dunlap IL PEORILPJXYX  224C ONVOY, LLC 368      
309-617 0 Dunlap IL   495J STRATUS NETWORKS 368   2021-03-31   
309-617 1 Dunlap IL   624H ONVOY SPECTRUM, LLC 368   2024-05-11   
309-617 2 Dunlap IL   224C ONVOY, LLC 368   2020-09-08   
309-617 3 Dunlap IL   224C ONVOY, LLC 368   2020-09-08   

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

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