Area code 861
Area code 861 is a telephone area code in the North American Numbering Plan. It serves Illinois, the United States.
- 861area code
- ILIllinois
- UScountry
- 24-Feb-23in service
How to dial a 861 number
From within the United States and Canada, dial 1, then 861, then the seven-digit number. From another country, dial your international access code, then +1 861 and the seven-digit number.
Area code 861 covers the same territory as 309. When several area codes share one area like this, it is called an overlay.
Other area codes in Illinois
217, 224, 309, 312, 331, 447, 464, 618, 630, 708, 730, 773, 779, 815, 847, 872
Frequently asked questions
Where is area code 861?
Area code 861 serves Illinois, the United States.
What is the country code for a 861 number?
Numbers with North American area codes use the country calling code +1.