Can you tell me what this font is used for the Comcast logo? If you do, that would be great! Thanks!

Cast  Suggested by SinMedia Studios LTD 
Comfortaa  Suggested by rexttg 
Century Gothic  Suggested by detroit25 
Gotham Rounded Light  Suggested by Ifeanyi Okoye 

This is pretty close,

http://www.dafont.com/comfortaa.font?text=COMCAST

The main difference is that all ends are rounded instead of only the start. And the angle on the M is more linear then bent.

Its a modified version of Century Gothic

This is a correct font for Comcast. Try this!

I think it's more like to century gothic..,

How come you idiots think Comcast uses those typefaces, this is the real name of the font

I agree with SinMedia on this one, the font is called Cast