reply to NetDog
Re: [IPv6] Evidence of Comcast IPv6 CPE Dual Stack (CPE and CPEP Whitehouse Station, NJ
Motorola SB6121 modem connected to ASUS RT-N16 with toastman's tomato build.
Don't have a screenshot either, just lit up at around 6AM today. Note, getting tomato working with this was a pain, there's a thread on the forums helping out.
Public IP starts with 2601:c: