It's Comcast (technical support).

I confirm another user's experience:  It's Comcast....I had a service call and their "automated" service kept calling me.  I never answer my phone, but saw this post so I called it back and sure enough, they will remove your number.  They just want to confirm your appt.

It's Comcast....I had a service call put in but canceled it twice but their "automated" service keeps calling me.  If you call the number back they will remove your number.

The dirtbag didn't even leave a message after interupting my lunch hour.