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.

Switch: SGNWMIFAZMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
989-229 A Clare MI 2550 123.NET, LLC 344      
989-278 A Alpena MI 2550 123.NET, LLC 344      
989-281 A Roscommon MI 2550 123.NET, LLC 344      
989-283 A Stanton MI 2550 123.NET, LLC 344      
989-322 A Bay City MI 2550 123.NET, LLC 344      
989-374 A Midland MI 2550 123.NET, LLC 344      
989-388 A Ithaca MI 2550 123.NET, LLC 344      
989-394 A Beaverton MI 2550 123.NET, LLC 344      
989-410 A Bad Axe MI 2550 123.NET, LLC 344      
989-437 A Standish MI 2550 123.NET, LLC 344      
989-472 A Owosso MI 2550 123.NET, LLC 344      
989-530 A Akron MI 2550 123.NET, LLC 344      
989-568 A Ashley MI 2550 123.NET, LLC 344      
989-571 A Vassar MI 2550 123.NET, LLC 344      
989-596 A Saginaw MI 2550 123.NET, LLC 344      
989-605 A Auburn MI 2550 123.NET, LLC 344      
989-719 A Clifford MI 2550 123.NET, LLC 344      
989-861 A Oscoda MI 2550 123.NET, LLC 344      
989-896 A West Branch MI 2550 123.NET, LLC 344      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.