Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 517 [Rate centres in NPA 517] [Dial plan for NPA 517]

NXX: 239

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-239 A De Witt MI DWTTMIXGPS0  0695 FRONTIER NORTH, INC. - MI 346      
517-239 0 De Witt MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2024-11-04   
517-239 1 De Witt MI LNNGMIMN08Z  991E BANDWIDTH.COM CLEC, LLC - MI 346   2025-01-23   
517-239 3 De Witt MI LNNGMIMN00Z  624H ONVOY SPECTRUM, LLC 346   2021-06-17   
517-239 4 De Witt MI DWTTMIXGPS0  0695 FRONTIER NORTH, INC. - MI 346   2015-06-22   
517-239 5 De Witt MI LNNGMIMN00Z  624H ONVOY SPECTRUM, LLC 346   2021-12-05   
517-239 6 De Witt MI LNNGMIMN00Z  624H ONVOY SPECTRUM, LLC 346   2021-12-05   
517-239 8 De Witt MI LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346   2023-03-09   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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