The area code 779 is located in Joliet, Illinois.
Area code 779 serves the vibrant city of Joliet, Illinois, along with nearby communities. Established in 2010 as an overlay for area code 815, it covers key landmarks such as the Joliet Area Historical Museum and the Harrah's Casino. This area is known for its rich history in transportation, being a major hub for railroads. Did you know Joliet is home to the famous Route 66? It's a great spot for both history buffs and travelers alike!