Local Calling Guide

Area code/prefix search

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

NXX: 557

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
989-557 A Higgins Lake MI SGNWMIFAXKX  543C ONVOY, LLCV - MI 344      
989-557 2 Higgins Lake MI   624H ONVOY SPECTRUM, LLC 344   2023-05-30   
989-557 5 Higgins Lake MI   543C ONVOY, LLCV - MI 344   2021-03-11   
989-557 6 Higgins Lake MI   543C ONVOY, LLCV - MI 344   2021-03-11   
989-557 7 Higgins Lake MI   543C ONVOY, LLCV - MI 344   2021-03-11   
989-557 8 Higgins Lake MI   543C ONVOY, LLCV - MI 344   2021-03-11   
989-557 9 Higgins Lake MI   543C ONVOY, LLCV - MI 344   2023-08-26   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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