Nope. Comcast is not using any CGN, as much as I know. Is your MacBook directly connected to the modem or a router? I presume the latter.
Cheers, Rajiv Sent from my Phone On Apr 7, 2013, at 11:47 AM, "Huasong Zhou" <huas...@kalorama.com> wrote: > I think Comcast is using CGN too!!! My IP address displayed on my MacBook is > in the 10.0.0.0/8 range, and ARIN website can't determine my IP address > either. > > Joe > > Sent from my iPhone > > On Apr 6, 2013, at 9:33 PM, "Joshua Smith" <juice...@gmail.com> wrote: > >> Very interesting indeed. Way to do the right thing here Verizon. This may be >> the first time I've been happy to be a Comcast customer. >> >> -- >> Josh Smith >> kD8HRX >> >> email/jabber: juice...@gmail.com >> Phone: 304.237.9369(c) >> >> Sent from my iPad >> >> >> On Apr 6, 2013, at 9:24 PM, "cb.list6" <cb.li...@gmail.com> wrote: >> >>> Interesting. >>> >>> http://www22.verizon.com/support/residential/internet/highspeedinternet/networking/troubleshooting/portforwarding/123897.htm >