Not positive about TW, but IME Comcast does not. I know people complain (fairly!) about comcast a lot, but some things they've consistently gotten right are st

Not positive about TW, but IME Comcast does not. I know people complain (fairly!) about comcast a lot, but some things they've consistently gotten right are stable IPs even if you don't pay for an explicit static address, and pushing v6 VERY hard.