Glass replacement from Alpine. Chances are you had your windshield replaced at some point in the past with them. They go through and call up previous customers asking if they have any damage to their windshields. Last time I had to replace a windshield was 4-5 years ago, and once or twice in the 3-5 years prior to that. They call about every 4-6 months just to check up if anything has changed. For me, its the same lady (voice and name) that's called 2-3 times a year the past 5 years.

Probably doesn't matter if you're "not even listed" or on a do not call thing, you most likely had your windshield replaced at some point in the past with them and that would constitue a "prior business relationship".