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: 503

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-503 A Towanda IL BLTNILXDXPX  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 366      
309-503 0 Towanda IL   224C ONVOY, LLC 366   2019-07-14   
309-503 1 Towanda IL   224C ONVOY, LLC 366   2019-07-14   
309-503 2 Towanda IL   490J DISH WIRELESS, LLC 366   2023-06-09   
309-503 3 Towanda IL   490J DISH WIRELESS, LLC 366   2026-01-02   
309-503 4 Towanda IL   624H ONVOY SPECTRUM, LLC 366   2023-06-02   
309-503 5 Towanda IL   224C ONVOY, LLC 366   2019-01-17   
309-503 6 Towanda IL   495J STRATUS NETWORKS 366   2020-10-14   
309-503 7 Towanda IL   508J CENTURYLINK COMMUNICATIONS, LLC 366   2014-08-13   
309-503 8 Towanda IL   073H TELNYX LLC 366   2020-07-20   
309-503 9 Towanda IL   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 366   2010-03-06   

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

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