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: CMPTMIIFCM0

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
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      
810-332 A Lapeer 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      
810-521 A Dryden MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-524 A Memphis MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
810-526 A Algonac 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      
810-910 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: Sun, 10 Nov 2019 13:49:34 UTC

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