How do ICBM early warning systems differentiate between a real threat and a launch of a normal rocket intended to go to space?

Question

How do ICBM early warning systems differentiate between a real threat and a launch of a normal rocket intended to go to space?

In: 2759

Answer 1

If it was launched from Cape Canaveral then it’s probably an orbital flight.

If it was launched from a silo in the middle of a field in idaho then it’s probs a ICBM