Main city: Mackinaw City
Timezone: Eastern
Phone type: Landline
Operator: Ameritech Michigan

Mackinaw City, a village in Emmet and Cheboygan counties in the U.S. state of Michigan. The population was 806 at the 2010 census; the population surges during the summer tourist season with the influx of seasonal workers who labor in the shops, hotels and other recreational facilities there and in the surrounding region. Mackinaw City is at the northern tip (headland)of the Michigan's Lower Peninsula along the southern shore of the Straits of Mackinac. Across the straits lies the state's Upper Peninsula. These two land masses are physically connected by the 8,614-foot (2,626 m) Mackinac Bridge, which runs from Mackinaw City north to St. Ignace. Mackinaw City is also the primary base for Ferry service to Mackinac Island, located to the northeast in the straits. ^source

231 is a North American telephone area code in the U.S. state of Michigan. It was created in June 1999 as a split from area code 616. 231 is essentially the northern half of the old 616 area code. 616 previously covered the entire western half of the state of Michigan, extending west from the north-south line aligned with the Mackinac Bridge. ^source