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.

Prattville, MI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
517-383 A PRVLMIXJRSA  4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      
517-696 A MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-696 0   624H ONVOY SPECTRUM, LLC 346   2024-05-10   
517-696 1   543C ONVOY, LLCV - MI 346   2021-06-18   
517-696 2   543C ONVOY, LLCV - MI 346   2021-07-11   
517-696 3   3535 ACD TELECOM, INC. - MI 346      
517-696 6   543C ONVOY, LLCV - MI 346   2018-10-12   
517-696 9   145J TERRA NOVA TELECOM INC. 346   2025-07-31   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.