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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
248-228 A Southfield MI 2550 123.NET, LLC 340      
248-247 A Troy MI 2550 123.NET, LLC 340      
248-633 A Birmingham MI 2550 123.NET, LLC 340      
248-724 A Pontiac MI 2550 123.NET, LLC 340      
248-776 A Royal Oak MI 2550 123.NET, LLC 340      
248-793 A Ortonville MI 2550 123.NET, LLC 340      
517-682 A Blissfield MI 2550 123.NET, LLC 340      
517-701 A Clinton MI 2550 123.NET, LLC 340      
586-354 A Warren MI 2550 123.NET, LLC 340      
734-245 A Livonia MI 2550 123.NET, LLC 340      
734-588 A Willis MI 2550 123.NET, LLC 340      
734-897 A Flat Rock MI 2550 123.NET, LLC 340      
810-267 A Lapeer MI 2550 123.NET, LLC 340      
810-315 A Dryden MI 2550 123.NET, LLC 340      
810-371 A Capac MI 2550 123.NET, LLC 340      
810-375 A Dryden MI 2550 123.NET, LLC 340      
810-390 A Fenton MI 2550 123.NET, LLC 340      
810-426 A Marine City MI 2550 123.NET, LLC 340      
810-442 A Deckerville MI 2550 123.NET, LLC 340      
810-512 A Algonac MI 2550 123.NET, LLC 340      
810-699 A Applegate MI 2550 123.NET, LLC 340      
810-827 A Emmett MI 2550 123.NET, LLC 340      
810-901 A Sandusky MI 2550 123.NET, LLC 340      
810-991 A Hartland MI 2550 123.NET, LLC 340      

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

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