313-232-3647 (although didn't need the area code back in those days. 1980-1985) True story- my parents had that phone number engraved into the cross bar on my bike- not in case it got stolen, but in case I got into a crash and was unconscious...or worse.
I remember party calling, barely. At my grandparents house would only have to dial the last 4 numbers and it would connect.