| 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 |
|---|---|---|---|
| 317-387 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-388 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-390 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-391 | Marion | Indianapolis, IN | Usa Mobility Wireless |
| 317-392 | Shelby | Shelbyville, IN | Ameritech Indiana |
| 317-393 | Marion | Indianapolis, IN | Usa Mobility Wireless |
| 317-394 | Marion | Indianapolis, IN | Usa Mobility Wireless |
| 317-395 | Shelby | Shelbyville, IN | Tw Telecom Of Indiana Lp |
| 317-396 | Marion | Indianapolis, IN | Mcleodusa Telecommunications Services- In |
| 317-397 | Marion | Indianapolis, IN | Sprint Spectrum L.p. |
| 317-398 | Shelby | Shelbyville, IN | Ameritech Indiana |
| 317-399 | Hamilton | Westfield, IN | Tw Telecom Of Indiana Lp |
| 317-400 | Marion | Indianapolis, IN | Sprint Spectrum L.p. |
| 317-401 | Shelby | Shelbyville, IN | Sprint Spectrum L.p. |
| 317-402 | Marion | Indianapolis, IN | Cellco Partnership DBA Verizon Wireless |
| 317-403 | Marion | Indianapolis, IN | New Cingular Wireless PCS - IL |
| 317-404 | Marion | Indianapolis, IN | American Messaging (am) |
| 317-405 | Marion | Indianapolis, IN | AT&T Local |
| 317-406 | Hendricks | Plainfield, IN | Ameritech Indiana |
| 317-407 | Marion | Indianapolis, IN | Cellco Partnership DBA Verizon Wireless |
There are 729 prefixes, In the code area, the major cities are Carmel, IN;Fishers, IN;Greenwood, IN;Indianapolis,. The major city is Indianapolis.