The Public Utilities Commission of Ohio will add another area code in some western and southern parts of the state.
The 326 code will officially take effect in March 2020 and be overlaid on top of the existing 937 area code that serves cities such as Dayton and Marysville.
The commission says all existing 937 area code users will keep their current numbers and area code. The 326 area code will be assigned to new numbers in the 937 area code.
Telecommunications officials say the 937 area code is expected to run out of available phone numbers in 2020.