List of Indiana area codes

Prior to January 2002, the entire northern part of Indiana was under the 219 area code.

Population growth and increases in cell phone numbers resulted in the 219 region being split into 3 sections.

After a random drawing, Northwest Indiana was allowed to retain the 219 area code.

Central Indiana remained under the 317 banner until 1997, when growth in and around Indianapolis prompted the creation of 765.

According to the Indiana Office of Utility Consumer Counselor, the 812 area code was set to run out of numbers by 2015.