Local Calling Guide

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Ramsey, IL

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
618-423 A RMSYILXEDS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 520      
618-423 0   1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 520      
618-423 1   1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 520      
618-423 2   1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 520      
618-423 3   224C ONVOY, LLC 520   2018-08-20   
618-423 4   073H TELNYX LLC 520   2021-10-26   
618-423 5   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 520   2017-10-15   
618-423 6   508J CENTURYLINK COMMUNICATIONS, LLC 520   2016-01-23   
618-423 7   224C ONVOY, LLC 520   2019-07-29   
618-423 8   224C ONVOY, LLC 520   2019-07-29   
618-423 9   1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 520      
618-991 A STLSMOWQDS2  224C ONVOY, LLC 520      
618-991 0   624H ONVOY SPECTRUM, LLC 520   2025-01-04   
618-991 1   145J TERRA NOVA TELECOM INC. 520   2025-05-31   
618-991 2   224C ONVOY, LLC 520   2023-10-23   
618-991 3   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 520   2025-09-27   

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

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