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: 871

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-871 A Allendale IL OLNYILXEFMD  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 978      
618-871 1 Allendale IL OLNYILXEGMD  224C ONVOY, LLC 978   2020-10-23   
618-871 2 Allendale IL OLNYILXEGMD  224C ONVOY, LLC 978   2020-10-23   
618-871 3 Allendale IL OLNYILXEGMD  224C ONVOY, LLC 978   2021-05-09   
618-871 4 Allendale IL OLNYILXEGMD  224C ONVOY, LLC 978   2021-05-09   
618-871 5 Allendale IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 978   2025-11-24   
618-871 6 Allendale IL OLNYILXEFMD  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 978   2009-08-10   
618-871 7 Allendale IL OLNYILXEGMD  224C ONVOY, LLC 978   2021-06-07   
618-871 8 Allendale IL OLNYILXEX2X  624H ONVOY SPECTRUM, LLC 978   2023-07-29   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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