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area code

Biggest city:





Eastern (GMT -5)

Nearby area codes: 

Zip codes



Major Cities:

Traverse City, Alpena, Gaylord, Cheboygan, Grayling.


Average Income:





Unemployment Rate:

Area code 947 is a significant part of the telephone numbering plan in the United States, specifically in the state of Michigan. Geographical Coverage: Area code 947 serves the Oakland County area in Southeastern Michigan, including the city of Troy. It operates as an overlay for the existing area code 248. This means that it covers the same geographic area as 248, including other cities like Southfield, Novi, and Farmington Hills. Introduction as an Overlay Code: The 947 area code was introduced in 2002 to provide additional numbering resources for the region. The demand for phone numbers in the Oakland County area had increased significantly, particularly due to the proliferation of cell phones and internet services. The introduction of 947 allowed for more phone numbers without changing the existing 248 numbers. Impact on Dialing Patterns: With the introduction of the 947 overlay, 10-digit dialing (area code + phone number) became mandatory for all calls within this region. This means that even for local calls within the same area code, the full 10-digit number must be dialed. In conclusion, area code 947 plays a vital role in Michigan's telecommunication infrastructure, particularly in the Oakland County area, including Troy. Its implementation as an overlay area code reflects the growing telecommunications needs and technological advancements in this economically vibrant and densely populated region.
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