The only vaguely plausible way this kind of scenario can possibly happen is if the person (a HUGE local radio fan) has just awoken out of a 30 year coma. And even in this unlikely scenario, he/she will be so overwhelmed by the world that has emerged since 1988 ("....and do you still remember Donald Trump? Well adjust the bed and brace yourself, I have even more bad news..."), they won't even thinking about radio. Let alone old call letters.
If you came out of a two year coma, KUBE is still KUBE.