| Area code | Year created | Parent NPA | Overlay | Numbering plan area |
|---|---|---|---|---|
| 317 | 1947 | – | 317/463 | Metro Indianapolis; Boone County, Hancock County, Hamilton County, Hendricks County, Johnson County, Marion County, Morgan County, and Shelby County |
| 463 | 2016 | 317 | ||
| 219 | 1948 | 317 | – | Northwest corner of the state, including Gary, Hammond, Merrillville, Valparaiso, and Michigan City |
| 765 | 1997 | 317 | – | Central Indiana, except the Indianapolis metro area |
| 260 | 2002 | 219 | – | Northeast Indiana, including Fort Wayne, and Angola. |
| 574 | 2002 | 219 | – | North-central Indiana, including South Bend, North Judson, and Warsaw |
| 812 | 1947 | – | 812/930 | Evansville, Vincennes, Terre Haute, Bloomington, Columbus, Madison, and Jeffersonville |
| 930 | 2015 | 812 | ||