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: SFLDMIMKNMD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
810-410 0 Flint MI 460K FIRST COMMUNICATIONS, LLC 340   2008-09-19   
810-487 6 Flushing MI 460K FIRST COMMUNICATIONS, LLC 340   2010-04-23   
810-584 2 Grand Blanc MI 460K FIRST COMMUNICATIONS, LLC 340   2009-05-28   
810-714 6 Fenton MI 460K FIRST COMMUNICATIONS, LLC 340   2016-02-21   
947-269 A Rochester MI 460K FIRST COMMUNICATIONS, LLC 340      
947-269 0 Rochester MI 460K FIRST COMMUNICATIONS, LLC 340   2023-12-08   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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