An intermediate-range ballistic missile, or IRBM, is a ballistic missile with a range of 2750-5500 km or 1719-3437 miles.

Alternative use of launchers
IRBMs are frequently turned into small satellite launchers via the addition of (usually multiple) upper stages. In the United States, this happened to both the Thor and Jupiter. A derivative of the Jupiter, the Jupiter-C launched the U.S.'s first satellite, Explorer 1.

Examples include:

Thor
Redstone
Jupiter IRBM
Shavit
Taepo Dong 2
Pluton
Hades
SM-64 Navaho (cancelled)