What is 217 area code?

The 217 area code serves central Illinois in the United States. It covers a large geographic area, including major cities like Springfield, Decatur, and Champaign. It was one of the original area codes established in 1947. Due to increasing demand for phone numbers, an area code overlay was implemented in 2021 introducing the new area code 447 to the same geographic region, requiring 10-digit dialing for all calls. The 217 area code is in the Central Time Zone (CT).