This number has called me 6 times.  I finally answered and there was no connection.

Some kind of sales agents for Comcast.  
Called from work listened to the message, someone from Comcast answered, then I hung up on THEM.

I also spoke with an agent from 888-274-7512.  Give them some time to talk about it they have some really good deals on packages plus they were super polite.

Been getting calls from them for months now. I won't answer them knowing it is a scam.

Received call from 888-274-7512 at 9:06 AM PST on 2/20/13. Rang twice and disconnected. I didn't get to the phone soon enough to answer but probably wouldn't have answered because the id was unknown. No voice message was left. I won't call back. I hate telemarketers. I have broadband service from Comcast.

I also got the call just now but fortunately found this entry first and let it go to voicemail.
Someone correct me if I'm wrong, but...
If you're already a Comcast customer, then they're not in violation of the DNC List - that list is null and void if you have an existing relationship with the company.

I just got a call, but no connection.

Unsolicited phone call -- I am on the National "No Call" registry -- a blog states that this number is a Comcast solicitation.  If it is, Comcast is in violation of the "no call" rules.

I got a call from this number at 8:30 on a saturday morning. I picked up but there was nothing on the other end I said hello twice and then I hung up. I called it back about an hour later and it said it was "Market Link" and that it was from Comcast to tell me about blah, blah, blah, then it transfered me to a live person and I hung up.

This number called me so I didn't answer it. No voice mail was left.

Called me twice, no connection both times. Called back; this is a marketing company calling on behalf of Comcast.

I've gotten early morning calls from this number twice now. I don't answer unknown numbers, so I let it go to voicemail. They didn't leave a message, either time. The 2nd time, I called them back to find out who it was, and got a message saying, "Your call cannot be completed as dialed." Comcast would make sense (thanks, i.hate.telemarketers), since I haven't gotten around to updating my TV tuner for their new system. They really ought to leave a message, though.

Called and asked for John Balboa.  Told them they had the wrong number.

i got this call as well, but got disconnected before answering it. went to google and found this page. thank you. i will forward this to voice message next time.

This is Comcast trying to get you to buy more expensive packages than you currently have.  If you tell them to stop calling you, they will just continue.