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: 636

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-636 A Alton IL COVLILCQXNX  478J NUSO, LLC 520      
618-636 0 Alton IL   984E BANDWIDTH.COM CLEC, LLC - IL 520   2021-05-10   
618-636 1 Alton IL   478J NUSO, LLC 520   2020-10-27   
618-636 2 Alton IL   984E BANDWIDTH.COM CLEC, LLC - IL 520   2021-05-10   
618-636 3 Alton IL   939H COMMIO, LLC 520   2022-12-10   
618-636 4 Alton IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2024-11-22   
618-636 5 Alton IL   984E BANDWIDTH.COM CLEC, LLC - IL 520   2021-09-20   
618-636 6 Alton IL   075A DELTA COMMS, LLC DBA CLEARWAVE COMMUNICATIONS - IL 520   2021-02-28   
618-636 7 Alton IL   984E BANDWIDTH.COM CLEC, LLC - IL 520   2021-09-20   
618-636 8 Alton IL   624H ONVOY SPECTRUM, LLC 520   2021-07-02   
618-636 9 Alton IL   495J STRATUS NETWORKS 520   2020-12-18   

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

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