| 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 |
|---|---|---|---|
| 317-367 | Marion | Indianapolis, IN | American Messaging (am) |
| 317-368 | Marion | Indianapolis, IN | American Messaging (am) |
| 317-369 | Hancock | Greenfield, IN | Comcast Phone Of Central Indiana |
| 317-370 | Marion | Indianapolis, IN | New Cingular Wireless PCS - IL |
| 317-371 | Marion | Indianapolis, IN | New Cingular Wireless PCS - IL |
| 317-372 | Marion | Indianapolis, IN | New Cingular Wireless PCS - IL |
| 317-373 | Marion | Indianapolis, IN | New Cingular Wireless PCS - IL |
| 317-374 | Marion | Indianapolis, IN | New Cingular Wireless PCS - IL |
| 317-375 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-376 | Hamilton | Cicero, IN | Level 3 Communications |
| 317-377 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-378 | Marion | Indianapolis, IN | Windstream Norlight |
| 317-379 | Hamilton | Noblesville, IN | New Cingular Wireless PCS - IL |
| 317-380 | Marion | Indianapolis, IN | Usa Mobility Wireless |
| 317-381 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-382 | Marion | Indianapolis, IN | Usa Mobility Wireless |
| 317-383 | Marion | Indianapolis, IN | Ameritech Indiana |
| 317-384 | Marion | Indianapolis, IN | Sprint Spectrum L.p. |
| 317-385 | Hamilton | Cicero, IN | Cellco Partnership DBA Verizon Wireless |
| 317-386 | Hendricks | Danville, IN | Global Crossing Local Services-in |
There are 729 prefixes, In the code area, the major cities are Carmel, IN;Fishers, IN;Greenwood, IN;Indianapolis,. The major city is Indianapolis.