Southern Indiana's 812 area code is due to run out of telephone numbers by 2015.
The Indiana Office of Utility Consumer Counselor says the telecommunications industry wants to "overlay" a new area code in the existing region instead of dividing it geographically.
The Evansville Courier & Press reports an overlay means existing numbers keep the 812 area code and new numbers get the new area code.
If there's a geographic split, some current customers keep the 812 code while others get the new one.
The Indiana Utility Regulatory Commission will choose.
People can submit comments at http://www.in.gov/oucc/2718.htm, email them to uccinfo(at)oucc.IN.gov, fax them to 317-232-5923, or mail them to Consumer Services Staff, Office of Utility Consumer Counselor, 115 W. Washington St., Suite 1500 South, Indianapolis, IN 46204.