Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
618-299 A ALDLILXERS0  1015 FRONTIER NORTH, INC. - IL 978      
618-299 0   9915 DELTA COMMS, LLC DBA CLEARWAVE COMMUNICATIONS - IL 978   2003-02-06   
618-299 1   1015 FRONTIER NORTH, INC. - IL 978      
618-299 2   1015 FRONTIER NORTH, INC. - IL 978      
618-299 3   1015 FRONTIER NORTH, INC. - IL 978      
618-871 A OLNYILXEFMD  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 978      
618-871 1   224C ONVOY, LLC 978   2020-10-23   
618-871 2   224C ONVOY, LLC 978   2020-10-23   
618-871 3   224C ONVOY, LLC 978   2021-05-09   
618-871 4   224C ONVOY, LLC 978   2021-05-09   
618-871 5   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 978   2025-11-24   
618-871 6   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 978   2009-08-10   
618-871 7   224C ONVOY, LLC 978   2021-06-07   
618-871 8   624H ONVOY SPECTRUM, LLC 978   2023-07-29   

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

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