This number is CitiBank, who finances Home Depot credit cards, and probably several others. It's annoying that the number reads "not provided"...and that they called 4x when I was only a week late (but I had been 15 days late once before). They did leave messages & a 1-866-458-7618 toll-free number to call back. I called them back, they had my acct info and made a I payment over the phone. No big deal.
What I got from looking it up on White Pages Reverse Pbone Search is that is is a Land Line in Midway, TN. Funny thing that they WON'T leave a message when they call, as I have voice mail that picks up when I'm at work, and if they were trying to collect money for someone, they SHOULD have left a message.
Personally, I suspect it's a bunch of scam artists who are using an autodialer and making up something (like they're a bill collector) if someone picks up, because I'm not behind on ANY bills and don't know anyone in Tennessee.....