Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
815-437 A PTNMILXDDS0  1036 FRONTIER NORTH, INC. - IL 368      
815-437 1   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 368   2015-11-05   
815-437 2   1036 FRONTIER NORTH, INC. - IL 368      
815-437 3   624H ONVOY SPECTRUM, LLC 368   2024-12-02   
815-437 4   224C ONVOY, LLC 368   2024-12-30   
815-437 7   508J CENTURYLINK COMMUNICATIONS, LLC 368   2016-08-05   
815-437 8   495J STRATUS NETWORKS 368   2020-08-02   
815-437 9   1036 FRONTIER NORTH, INC. - IL 368      

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

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