Who called from 7207290912

Not sure how they got my number.  Worried it's a spammer.

Has been on my reject list for over a month. I still see phone calls listed daily from 720-729-0912. The first and second time they called and I answered no one talked.

Called my cell. When I answered lady identified herself as some trip advisor and if I could hear her. I said Who are you with again? and she hung up.

I keep getting calls from the number below