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: 487

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-487 A Downs IL BLTNILXDXPX  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 366      
309-487 1 Downs IL BLTNILXDX1Y  073H TELNYX LLC 366   2020-07-06   
309-487 2 Downs IL BLTNILXDXMX  224C ONVOY, LLC 366   2021-02-12   
309-487 3 Downs IL BLTNILXDXMX  224C ONVOY, LLC 366   2021-04-03   
309-487 4 Downs IL BLTNILXDXMX  224C ONVOY, LLC 366   2019-01-17   
309-487 5 Downs IL BLTNILTS7MD  145J TERRA NOVA TELECOM INC. 366   2024-02-10   
309-487 6 Downs IL BLTNILXDXMX  224C ONVOY, LLC 366   2021-07-04   
309-487 7 Downs IL BLTNILXDXZX  508J CENTURYLINK COMMUNICATIONS, LLC 366   2014-08-12   
309-487 8 Downs IL BLTNILXDXMX  224C ONVOY, LLC 366   2019-07-14   
309-487 9 Downs IL BLTNILXDXMX  224C ONVOY, LLC 366   2019-07-14   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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