The area code 317 is located in Indianapolis, Indiana.
Area code 317 serves the heart of Indianapolis, Indiana, and much of central Indiana. Established in 1947 as one of the state’s original numbering plan codes, 317 anchors phone numbers across the capital and its nearby suburbs. It covers most of Marion County and parts of surrounding counties, connecting government, business, universities, and neighborhoods. Often called the “Crossroads of America,” Indianapolis sits where major interstates like I‑65, I‑70, I‑69, and I‑74 meet, making 317 a key hub for the region.
“Area code 317 was established in 1947.” — North American Numbering Plan Administration (NANPA)
Within the 317 footprint, you’ll find many of Indiana’s best-known landmarks: the Indianapolis Motor Speedway in Speedway, Lucas Oil Stadium, Monument Circle, the Indiana Statehouse, the Children’s Museum of Indianapolis, and Indianapolis International Airport. This area code also reaches major communities across central Indiana. Notable cities and towns in 317 include:
The history of 317 reflects the growth of Indiana’s phone network: its territory changed as new codes were created, including 219 for northern Indiana and a 1997 split that formed 765 outside the metro. Today, 317 is overlaid by 463, so local calls use 10‑digit dialing, but both area codes serve the same Indianapolis region. When you see a 317 phone number, it typically points to the Indianapolis metropolitan area and its close suburbs. For new lines, numbers may be assigned in either 317 or 463, ensuring plenty of options for businesses, residents, and mobile users across central Indiana.