[LargoLasskhyfv]

What about something like this rather old https://en.wikipedia.org/wiki/ASM-135_ASAT ? There should be some updates meanwhile. Anyway. Assuming NORAD or similar has the rough ballistic track of the potential intruder, and can thus determine the entry ellipsoid, why wouldn't some jets on air patrol in or around that ellipsoid be capable of intercepting it with an air launched system?

edit: Or even from the sea, like this: https://en.wikipedia.org/wiki/RIM-161_Standard_Missile_3

As I understand it in my utter ignorance, you don't have to race with something coming in and down at Mach 10, or more. You just have to be in its way at the right time. Which seems doable, in this case, coming from NK, high over the Pacific.