| 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 |
|---|---|---|---|
| 317-221 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-222 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-223 | Marion | Indianapolis, IN | Tw Telecom Of Indiana Lp |
| 317-224 | Marion | Indianapolis, IN | Windstream Norlight |
| 317-225 | Marion | Indianapolis, IN | Level 3 Communications |
| 317-226 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-227 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-228 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-229 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-230 | Marion | Indianapolis, IN | Tw Telecom Of Indiana Lp |
| 317-231 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-232 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-233 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-234 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-235 | Marion | Indianapolis, IN | American Messaging (am) |
| 317-236 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-237 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-238 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-239 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-240 | Marion | Indianapolis, IN | Ameritech Indiana |
There are 729 prefixes, In the code area, the major cities are Carmel, IN;Fishers, IN;Greenwood, IN;Indianapolis,. The major city is Indianapolis.