Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 309 [Rate centres in NPA 309] [Dial plan for NPA 309]

NXX: 987

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-987 A Cordova IL RCISILRIWMD  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634      
309-987 1 Cordova IL   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634   2010-04-15   
309-987 2 Cordova IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 634   2020-12-23   
309-987 3 Cordova IL   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 634   2019-05-06   
309-987 4 Cordova IL   224C ONVOY, LLC 634   2021-04-05   
309-987 7 Cordova IL   508J CENTURYLINK COMMUNICATIONS, LLC 634   2016-10-12   
309-987 8 Cordova IL   224C ONVOY, LLC 634   2020-04-29   
309-987 9 Cordova IL   495J STRATUS NETWORKS 634   2020-10-14   

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

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