No clue who's calling, but they didn't leave a voicemail message either.

Google this number, and you'll find several reports about scammers phishing for credit card numbers.  Often, they disconnect after one ring, just to get their number in your phone.  They hope you'll call them back.  Don't bother.

No idea who just called,  left no voicemail either

Called the number back, they said they had a $100 gift card because I had visited and affiliated web site and to please hold to be connected to n available associate. No I didn't wait - pressed 2 to be put on DNC list

It is a 100 dollar card from a company called valuepass.. phone says they are based out of Farmington maine but it's doubtful... says I either filled out a recent survey or shopped at a large box store to get the information. I have never given out my phone number.. don't do it