Same just happened to me. Called, I said 'hello' there was a one second pause and then they hung up. I thought I heard background sounds like voices and activity.
I have two phone lines into my house. Got a call on one of them and there was dead air when I answered.
A minute later my other line rang and I said hello. Someone said "hello?" back as if they were surprised. There were voices in the background like this was some call center boiler room. They disconnected.
Obvious junk call and they should be reported for harrassing people.
If you Google this number you will see its a hooker. Yes. A hooker. Why is she calling me? I have no idea?!? I am hetero and don't need to pay for it. LOL