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.
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
586-450 A Mount Clemens MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-451 A Roseville MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-485 A Mount Clemens MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-507 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-568 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-681 A Mount Clemens MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-704 A Mount Clemens MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-708 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-717 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-830 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-831 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-832 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-856 A Utica MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-870 A New Baltimore MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-896 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-898 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-912 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-916 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-974 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-975 A Mount Clemens MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-208 A Flat Rock MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-267 A Romulus MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-296 A Livonia MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-297 A Monroe MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-305 A Monroe MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-504 A Wayne MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-566 A Plymouth MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-651 A Ann Arbor MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-670 A Ann Arbor MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-797 A Livonia MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-798 A Flat Rock MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-817 A Ann Arbor MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-852 A Livonia MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-860 A Ypsilanti MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-203 A Applegate MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-205 A Port Huron MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-253 A Imlay City MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-312 A Brighton MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-340 A Port Huron MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-389 A Flint MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-548 A Lapeer MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-557 A Sandusky MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-595 A Brighton MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-661 A Flint MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-680 A Brighton MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-812 A Flint MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-833 A Flint MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-972 A Flint MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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