| 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 |
|---|---|---|---|
| 317-873 | Boone | Zionsville, IN | Ameritech Indiana |
| 317-874 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-875 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-876 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-877 | Hamilton | Cicero, IN | Frontier North |
| 317-878 | Johnson | Trafalgar, IN | United Tel. Co. Of Indiana DBA Centurylink |
| 317-879 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-880 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-881 | Johnson | Greenwood, IN | Ameritech Indiana |
| 317-882 | Johnson | Greenwood, IN | Ameritech Indiana |
| 317-883 | Johnson | Greenwood, IN | Ameritech Indiana |
| 317-884 | Johnson | Greenwood, IN | Ameritech Indiana |
| 317-885 | Johnson | Greenwood, IN | Ameritech Indiana |
| 317-886 | Johnson | Greenwood, IN | Mci Worldcom Communications |
| 317-887 | Johnson | Greenwood, IN | Ameritech Indiana |
| 317-888 | Johnson | Greenwood, IN | Ameritech Indiana |
| 317-889 | Johnson | Greenwood, IN | Ameritech Indiana |
| 317-890 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-891 | Marion | Cumberland, IN | Ameritech Indiana |
| 317-892 | Hendricks | Pittsboro, IN | Home Telephone Co. Of Pittsboro |
There are 729 prefixes, In the code area, the major cities are Carmel, IN;Fishers, IN;Greenwood, IN;Indianapolis,. The major city is Indianapolis.