Area code 586 is located in Michigan and covers the following cities: Warren, Sterling Heights, St. Clair Shores, Armada, Center Line, Chesterfield Township, Clinton Charter Township, Eastpointe, Fraser, Harrison Township, Lenox Township, Macomb Township, Memphis, Mount Clemens, New Baltimore, New Haven, Oak Park, Pontiac, Richmond, Romeo, Roseville, Southfield, Utica, and Washington. It was introduced in 2001 as a split from area code 810, and its territory was originally part of area code 313. The dialing pattern for local calls within the same NPA (area code) is 7D.