Area code 586 covers northeastern Michigan’s Macomb County, including cities such as Warren, Sterling Heights, and Clinton Township. Established in 2001 from a split with 810, it is part of the Detroit metropolitan area and plays a critical role in the automotive industry and suburban residential growth. Seven-digit dialing is still prevalent. Area code 586 represents the industrial backbone and suburban expansion of Michigan’s automotive heartland, carrying strong ties to manufacturing heritage and community identity.