Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Castleton, IL

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
309-479 A CSTNILXDRS0  1015 FRONTIER NORTH, INC. - IL 368      
309-479 0 PEORILPJDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 368   2015-11-01   
309-479 2 CSTNILXDRS0  1015 FRONTIER NORTH, INC. - IL 368      
309-479 4 KEWNILXDIMD  224C ONVOY, LLC 368   2020-06-15   
309-479 5 KEWNILXDFMD  624H ONVOY SPECTRUM, LLC 368   2023-07-08   
309-479 9   145J TERRA NOVA TELECOM INC. 368   2025-06-06   
309-480 A PEORILTCDS0  5800 ITV-3, LLC D/B/A I3 BROADBAND 368      
309-480 0 PEORILTCDS0  5800 ITV-3, LLC D/B/A I3 BROADBAND 368      
309-480 1 KEWNILXDIMD  224C ONVOY, LLC 368   2021-04-03   
309-480 4 KEWNILXDIMD  224C ONVOY, LLC 368   2021-02-12   
309-480 7 PEORILPJX1Z  508J CENTURYLINK COMMUNICATIONS, LLC 368   2016-08-02   
309-480 8 PEORILPJXRZ  495J STRATUS NETWORKS 368   2020-08-03   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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