What is what area code is 248?

The area code 248 is a North American telephone area code serving the northern suburbs of Detroit, Michigan. These suburbs include cities such as Farmington Hills, Troy, Southfield, Pontiac, Royal Oak, Bloomfield Hills, and Novi, among others. The area code 248 was introduced in 1997 as an overlay for the 810 area code and expanded to the northwestern suburbs of Detroit in 2002. Today, it covers an area of about 805 square miles and serves more than 1.2 million people.