Area code 248 serves Detroit’s northern suburbs in Oakland County, Michigan, including Troy, Farmington Hills, and Bloomfield. Established in 1997 as a split from 810, it is now overlaid with 947, requiring ten-digit dialing. The area is known for its affluence, automotive industry connections, and business development. Area code 248 is a hallmark of suburban sophistication and economic vitality in metro Detroit, often linked to high-performing schools, upscale neighborhoods, and commerce.