Local Calling Guide

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NPA: 989 [Rate centres in NPA 989] [Dial plan for NPA 989]

NXX: 639

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
989-639 A Grace Harbor MI SGNWMIACEMD  516J TON80 COMMUNICATIONS, LLC 344      
989-639 7 Grace Harbor MI SGNWMIACEMD  516J TON80 COMMUNICATIONS, LLC 344   2022-03-31   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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