Phone rang for 1.5 seconds, no voicemail, upon calling back it's a computer trying to get you to claim "a free $100 gift card to a major retailer". I didn't try to claim the gift card.
Called at 8:17 in the morning. Called back thirty minutes later; the open rings were strangely longer, with more spaces. There was an automated message on the other end with no answering machine (seemed like a business).