Absurd caller! Called twice today and will not respond when I said Hello, just hung there. WTF?? Also just bought a domain name from godaddy a couple days ago, similar to other people who've posted here.
Ditto @CrystalRaven. Answered the call (after having missed it 2x before on the same day), there was a pause for like 8 seconds, then a creepy voice: "Goodbye."