Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 618 [Rate centres in NPA 618] [Dial plan for NPA 618]

NXX: 456

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-456 A West Salem IL WSLMILXEDS0  1036 FRONTIER NORTH, INC. - IL 978      
618-456 0 West Salem IL OLNYILXEEMD  9915 MCC NETWORK SERVICES, LLC 978   2003-02-05   
618-456 1 West Salem IL OLNYILXEGMD  224C ONVOY, LLC 978   2020-03-13   
618-456 2 West Salem IL WSLMILXEDS0  1036 FRONTIER NORTH, INC. - IL 978      
618-456 3 West Salem IL WSLMILXEDS0  1036 FRONTIER NORTH, INC. - IL 978      
618-456 4 West Salem IL OLNYILXEX2X  624H ONVOY SPECTRUM, LLC 978   2023-07-29   
618-456 6 West Salem IL OLNYILABQMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 978   2015-07-12   
618-456 7 West Salem IL OLNYILXEGMD  224C ONVOY, LLC 978   2021-04-09   
618-456 8 West Salem IL WSLMILXEDS0  1036 FRONTIER NORTH, INC. - IL 978      

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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