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: 529

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-529 A Alpha IL ALPHILXDRS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 634      
309-529 0 Alpha IL ALPHILXDRS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 634      
309-529 1 Alpha IL CHCGIL24XMD  495J STRATUS NETWORKS 634   2020-10-14   
309-529 2 Alpha IL ALPHILXDRS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 634      
309-529 3 Alpha IL RCISILRIX3X  224C ONVOY, LLC 634   2020-04-29   
309-529 4 Alpha IL ALPHILXDRS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 634      
309-529 5 Alpha IL ALPHILXDRS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 634      
309-529 6 Alpha IL RCISILRIX4X  506J TWILIO INTERNATIONAL, INC. 634   2021-08-31   
309-529 7 Alpha IL RCISILRIX3X  224C ONVOY, LLC 634   2021-04-05   
309-529 8 Alpha IL ALPHILXDRS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 634      
309-529 9 Alpha IL ALPHILXDRS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 634      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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