I called the number back and it is Charter trying to sell additional services.
Other
2
Oct 12, 2012
Charter trying to sell services.
Telemarketer
3
Oct 21, 2012
Rings at least one a day and no one is there
Other
4
Jun 14, 2011
Customer called AT&T about receiving calls from this number almost every day multiple times a day with noone on the other end. Did some research and called number, it's Charter!