I got the same message. It said "hey Leo" I asked who it was and all they said was ":) A.dd me on y.a.h.0.0. IM ... id is juliachikie67" I didn't respond after that.
No idea who this number is. I suspect some company's database of names & numbers has been hacked. And the spammers/hackers who have access are trying to figure out which ones are actually active.