Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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

NXX: 566

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
989-566 A Mayville MI SGNWMIACEMD  516J TON80 COMMUNICATIONS, LLC 344      
989-566 0 Mayville MI SGNWMIFAXKX  543C ONVOY, LLCV - MI 344   2023-08-26   
989-566 1 Mayville MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 344   2026-01-11   
989-566 2 Mayville MI SGNWMIFAXWY  624H ONVOY SPECTRUM, LLC 344   2024-08-11   
989-566 6 Mayville MI SGNWMIACEMD  516J TON80 COMMUNICATIONS, LLC 344   2022-04-23   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.