Missed a call from this number, location is near where I used to live, but I moved 2000 miles away 7 yrs ago. I just kept the number I'd had for many years. It's in no databases I checked but neither is it in my social media, and had it been any of them, they'd have posted.
So I'm blocking it. I'm just of the opinion - block first, ask questions later, these days! ;)