| District of Indiana area codes: 317 | |
|---|---|
| Country | United States |
| State/Province | Indiana |
| Major City | Indianapolis |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 317-831 | Morgan | Mooresville, IN | Ameritech Indiana |
| 317-832 | Marion | Indianapolis, IN | New Cingular Wireless PCS - IL |
| 317-833 | Marion | Indianapolis, IN | Tw Telecom Of Indiana Lp |
| 317-834 | Morgan | Mooresville, IN | Ameritech Indiana |
| 317-835 | Shelby | Fairland, IN | Ameritech Indiana |
| 317-836 | Hamilton | Sheridan, IN | Global Crossing Local Services-in |
| 317-837 | Hendricks | Plainfield, IN | Ameritech Indiana |
| 317-838 | Hendricks | Plainfield, IN | Ameritech Indiana |
| 317-839 | Hendricks | Plainfield, IN | Ameritech Indiana |
| 317-840 | Marion | Indianapolis, IN | New Cingular Wireless PCS - IL |
| 317-841 | Hamilton | Fishers, IN | Ameritech Indiana |
| 317-842 | Hamilton | Fishers, IN | Ameritech Indiana |
| 317-843 | Hamilton | Carmel, IN | Ameritech Indiana |
| 317-844 | Hamilton | Carmel, IN | Ameritech Indiana |
| 317-845 | Hamilton | Fishers, IN | Ameritech Indiana |
| 317-846 | Hamilton | Carmel, IN | Ameritech Indiana |
| 317-847 | Marion | Indianapolis, IN | New Cingular Wireless PCS - IL |
| 317-848 | Hamilton | Carmel, IN | Ameritech Indiana |
| 317-849 | Hamilton | Fishers, IN | Ameritech Indiana |
| 317-850 | Marion | Indianapolis, IN | New Cingular Wireless PCS - IL |
There are 729 prefixes, In the code area, the major cities are Carmel, IN;Fishers, IN;Greenwood, IN;Indianapolis,. The major city is Indianapolis.