Above the Kármán line. AFAICT, it didn't say how far above.
I'd be interested in knowing how much orbital debris has been created. If it's right above the line, probably not much with a significant life, as most bits will de-orbit with the atmospheric friction. But higher...?
>>toss1+(OP)
by definition, it's a ballistic missile. its trajectory is to hit the earth. It doesn't have enough velocity to stay in orbit. A missle hit on it isn't going to impart enough delta-v to it to keep any piece of it in orbit.