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: 417

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
447-417 A Springfield IL SPFDILESX3Y  506J TWILIO INTERNATIONAL, INC. 374      
447-417 4 Springfield IL SPFDILESX3Y  506J TWILIO INTERNATIONAL, INC. 374   2022-04-16   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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