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: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
447-257 A Mason City IL SPFDILESX2Y  566J RADIANTIQ LLC 374   2021-06-25   
447-257 0 Mason City IL SPFDILESXYX  495J STRATUS NETWORKS 374   2021-12-13   
447-257 4 Mason City IL SPFDILESX2Y  566J RADIANTIQ LLC 374   2021-06-25   
447-257 7 Mason City IL SPFDILES7MD  224C ONVOY, LLC 374   2021-08-01   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

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