The area code 618 is located in Alton, Illinois.
Area code 618 is the telephone area code serving Alton, Illinois and the surrounding areas. Located in the heart of the Midwest, Alton is known for its rich history, charming small-town atmosphere, and stunning natural beauty. Whether you're a resident or planning a visit, having the 618 area code means you're just a phone call away from exploring all that Alton has to offer. From riverfront parks and scenic trails to historic landmarks and local events, there's always something exciting happening in this vibrant part of Illinois. Stay connected with area code 618 and experience the true essence of Alton.