Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 217 [Rate centres in NPA 217] [Dial plan for NPA 217]

NXX: 858

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
217-858 A Thomasboro IL CHMPILRAUMD  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 370      
217-858 0 Thomasboro IL   073H TELNYX LLC 370   2020-07-20   
217-858 1 Thomasboro IL   624H ONVOY SPECTRUM, LLC 370   2024-05-18   
217-858 2 Thomasboro IL   224C ONVOY, LLC 370   2020-05-22   
217-858 3 Thomasboro IL   224C ONVOY, LLC 370   2020-05-22   
217-858 4 Thomasboro IL   224C ONVOY, LLC 370   2020-05-22   
217-858 5 Thomasboro IL   145J TERRA NOVA TELECOM INC. 370   2025-08-01   
217-858 6 Thomasboro IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 370   2020-03-03   
217-858 7 Thomasboro IL   224C ONVOY, LLC 370   2021-02-12   
217-858 8 Thomasboro IL   224C ONVOY, LLC 370   2021-02-12   
217-858 9 Thomasboro IL   224C ONVOY, LLC 370   2021-08-12   

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

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