I found a missed call from this number. I called back and a message said "Thank you for calling Market Link, an authorized vendor for Comcast", so I guess it must be some sort of promotion or telemarketing call.

I am also getting calls from this no. I picked up twice but no one answered. No voicemails too. I think it may be Comcast as I am also a comcast subscriber.

Annoying people. They call on my cell phone every day late afternoon/early evening pacific time. No voicemail. I have read that this may be from Comcast. Not sure though as I have never picked up their call, however, it does seem like they started after I subscribed to Comcast internet. There should  be a law for preventing marketing calls from not leaving VM or publicly providing their phone information.