I too received a call and called Covenant House to verify. It's legit. They have your private donations info because they are actually working on behalf of Covenant House. Donate! It's for a good cause!
Got a call from this number today . When I answered they hung up. I checked and I think it is from Covenant House . I donate to them once a year but they keep calling and sending me things which I told them to stop. I will not donate any more.