Area Code 947 — Troy, Michigan

947 Area Code – Troy, Michigan: Location, Time Zone & History

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About Area Code 947

Region Code
947
City
Troy
State
Michigan
Population
1,274,395
Largest City
Troy
Neighboring Codes
  • 810 (Flint, Michigan)
  • 586 (Warren, Michigan)
  • 313 (Detroit, Michigan)
  • 734 (Ann Arbor, Michigan)
Time Zone
Eastern Time

Map of Area Code 947

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History & Cultural Notes

Oakland County, Michigan is one of the wealthiest counties in the state, and it is served by two codes stacked on top of one another. Area code 248 split off from 810 in 1997 to cover the county, and by 2000 it was already outgrowing its supply of numbers. 947 was assigned as the relief overlay, with permissive 10-digit dialing beginning January 26, 2002 and 947 entering full service that September 7.

The 947/248 territory covers Troy, Southfield, Pontiac, Auburn Hills, Novi, and Farmington Hills, bordered by 810, 586, 313, and 734. Demand for 947 numbers traces directly to the explosive growth of mobile phones, fax lines, and competitive carriers in the region during the late 1990s.

  • Automotive engineering and manufacturing anchor the local economy, with major supplier headquarters clustered in the county.
  • Information technology and finance and insurance firms are heavily represented alongside healthcare and professional services.
  • Oakland County's roughly 1.27 million residents (2020 Census) make it one of Michigan's most populous and affluent counties.