Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 447 [Rate centres in NPA 447] [Dial plan for NPA 447]

NXX: 557

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
447-557 A Sidell IL CHMPILCPOMD  224C ONVOY, LLC 370      
447-557 0 Sidell IL   073H TELNYX LLC 370   2021-10-07   
447-557 1 Sidell IL   624H ONVOY SPECTRUM, LLC 370   2024-05-18   
447-557 4 Sidell IL   224C ONVOY, LLC 370   2021-06-17   
447-557 5 Sidell IL   224C ONVOY, LLC 370   2021-07-04   
447-557 7 Sidell IL   224C ONVOY, LLC 370   2021-06-18   
447-557 9 Sidell IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 370   2023-02-27   

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

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