309 Area Code
Central Illinois, Illinois
Area code 309 is located in Central Illinois, Illinois. It covers Peoria, Bloomington, and surrounding areas in the Central time zone (UTC-6). Administered by NANPA.
Where is area code 309?
Area code 309 is located in Central Illinois, Illinois. It covers Peoria, Bloomington, and surrounding areas in the Central time zone (UTC-6).
Cities Covered by Area Code 309
Area code 309 primarily serves the Central Illinois area of Illinois. The exact coverage includes Peoria, Bloomington, and Normal, along with surrounding communities and suburbs.
Time Zone
Central Time — UTC-6
Area code 309 operates in the Central Time Zone. When calling 309 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.
About Area Code 309
Area code 309 was introduced in 1957 as a geographic area code serving Central Illinois, Illinois. It remains the primary area code for this region. Area codes are administered by NANPA (North American Numbering Plan Administration), the organization responsible for managing phone number resources in the US and Canada.