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: 439

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
217-439 A Modesto IL MDSTILXCDS0  1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 374      
217-439 0 Modesto IL   1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 374      
217-439 1 Modesto IL   1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 374      
217-439 2 Modesto IL   224C ONVOY, LLC 374   2019-04-21   
217-439 3 Modesto IL   224C ONVOY, LLC 374   2019-04-21   
217-439 4 Modesto IL   224C ONVOY, LLC 374   2018-07-30   
217-439 5 Modesto IL   1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 374      
217-439 6 Modesto IL   224C ONVOY, LLC 374   2020-08-07   
217-439 7 Modesto IL   1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 374      
217-439 8 Modesto IL   224C ONVOY, LLC 374   2020-08-07   
217-439 9 Modesto IL   1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 374      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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