Community Forum
That channel is a new sub-channel for local channels in some areas.
Comcast cannot supply it unless it is carried by a local OTA channel in your area.
In Chicago, it is available on WBBM (owned by CBS) as channel 2.3. Odds are, there is currently no agreement to add it to Comcast.
I am loving the tv station Dabl 2.3. I only wish Xfinity would add it to their lineup in the 60431 area.