I too received a call from 4805555555. I answered, they asked "Is ******* in?" I didn't recognize the voice and I said, "hello?" and they repeated the same question, "Is ****** in?"
I find this extremely creepy, because I do not have a listed phone number, and ****** is my Nickname! Also, I have been receiving strange calls at work as well as emails, at work!! Email address is:
[email protected]