Area code 937 serves southwestern Ohio, including cities such as Dayton, Springfield, Xenia, and Troy. Established in 1996 from a split of the 513 area code, it covers a region with deep roots in aviation, manufacturing, and research. In 2020, area code 326 was introduced as an overlay to accommodate growing demand, making ten-digit dialing mandatory. Dayton, known as the birthplace of aviation, anchors the region with its historical significance and modern innovation hubs. 937 remains a central component of southwestern Ohio’s identity, serving both legacy institutions and emerging industries across the area.