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: 457

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
989-457 A Oscoda MI SGNWMIFAXKX  543C ONVOY, LLCV - MI 344      
989-457 0 Oscoda MI SGNWMIAC6MD  939H COMMIO, LLC 344      
989-457 4 Oscoda MI   624H ONVOY SPECTRUM, LLC 344      
989-457 7 Oscoda MI SGNWMIFAXKX  543C ONVOY, LLCV - MI 344      
989-457 8 Oscoda MI SGNWMIFAXKX  543C ONVOY, LLCV - MI 344      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.