Has called several times. No idea. I suspect a phishing scam.
 Oct 29th, 2014
Got a call from this number this morning and like others have said the caller didn't leave a voicemail. I tried calling it back by phone and it said the number wasn't valid. I called it back from my Gmail account and it just rang endlessly. Suspicious!
 Oct 29th, 2014
216-339-5537 called. They did not leave a message. It must not have been important.

Do not call back. Do not feed the beast(s).
Dick Cheney
 Oct 28th, 2014
Tried calling back and got message number not valid.
 Oct 28th, 2014
I didn't answer. I recognized that the number was Cleveland area because I have family there. I figured if they had to use someone else's phone, they'd leave voice mail & I'd call back. No voice mail. No idea who this is. Looks like a lot of people are suddenly getting calls from this number. I'm guessing spam, especially after checking other sites. Seems to be various scams being run from this number with a serious uptick of activity in the last week.
 Oct 22nd, 2014
Claims I won a free cruise - BS.
 Oct 20th, 2014