Area code 906 covers Michigan’s Upper Peninsula, including cities such as Marquette, Sault Ste. Marie, Escanaba, and Houghton. Created in 1961 from a split of area code 616, 906 serves a geographically large but sparsely populated area. The region is known for its forests, lakes, mining history, and outdoor recreation. It is the only area code in the Upper Peninsula and has become a strong cultural identifier among 'Yoopers'—residents of the U.P. The code is used in tourism marketing and community pride efforts. 906 is a symbol of the region’s rugged independence and natural beauty.