| KDDX | |
| City: | Spearfish, South Dakota |
| Area: | Rapid City, South Dakota |
| Branding: | X Rock |
| Frequency: | 101.1 MHz |
| Translator: | 103.5 K278AM (Spearfish) 103.5 K278AN (Rapid City) |
| Airdate: | 1985 (as KEZV) |
| Format: | Active rock |
| Erp: | 100,000 watts |
| Haat: | 545 meters (1788 feet) |
| Class: | C |
| Facility Id: | 17689 |
| Coordinates: | 44.3264°N -103.835°W |
| Former Callsigns: | KEZV (1983–1995) |
| Affiliations: | United Stations Radio Networks |
| Owner: | Riverfront Broadcasting, LLC |
| Sister Stations: | KOTA, KQRQ, KZLK, KZZI |
| Webcast: | Listen Live |
| Website: | xrock.fm |
| Licensing Authority: | FCC |
KDDX (101.1 FM, "X Rock") is a radio station licensed to serve Spearfish, South Dakota. The station is owned by Riverfront Broadcasting, LLC. It airs an active rock music format. With a 100,000 watt signal on a nearly 1,800 foot tall tower, the station covers much of western South Dakota (including Rapid City), and the Gillette/Northeast Wyoming area.
The station was assigned the KDDX call letters by the Federal Communications Commission on April 28, 1995.[1]