| 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 |
|---|---|---|---|
| 317-346 | Johnson | Franklin, IN | United Tel. Co. Of Indiana DBA Centurylink |
| 317-347 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-348 | Hamilton | Fishers, IN | Level 3 Communications |
| 317-350 | Hendricks | Brownsburg, IN | Comcast Phone Of Central Indiana |
| 317-351 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-352 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-353 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-354 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-355 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-356 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-357 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-358 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-359 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-360 | Bandwidth.com Clec | ||
| 317-361 | Marion | Indianapolis, IN | New Cingular Wireless PCS - IL |
| 317-362 | Marion | Indianapolis, IN | Comcast Phone Of Central Indiana |
| 317-363 | Marion | Indianapolis, IN | New Cingular Wireless PCS - IL |
| 317-364 | Shelby | Shelbyville, IN | New Cingular Wireless PCS - IL |
| 317-365 | Marion | Indianapolis, IN | American Messaging (am) |
| 317-366 | Marion | Indianapolis, IN | Sprint Spectrum L.p. |
There are 729 prefixes, In the code area, the major cities are Carmel, IN;Fishers, IN;Greenwood, IN;Indianapolis,. The major city is Indianapolis.