Scam....
Claiming they work for Comcast. They'll try to get your personal information.

They claim to be from Comcast following up on a an inquiry call although I stated previously I was not interested

This number called and left no message. I called back and after rigging got an automated, "Please leave your message after the beep. Sorry, this mailbox is full." But after reading the posts above I remembered that about three days ago I had called Comcast and inquired about their internet services. I did't a service plan with them, so it makes sense that they would be calling back to sell something.