> My desktop is pure v6 and GitHub works fine, which I think disproves the "never" part.

how?

▲ Dagger2 a day ago | parent [-]

My router maps the v4 address space into a v6 /96, and my DNS server returns AAAAs pointing to those addresses. I run my own, but try setting your DNS to 2a01:4f8:c2c:123f::1 (and disabling v4 altogether) to give that a go.

▲ tonymet a day ago | parent [-]

doesn't there have to be a NAT64 gateway at the router?

	▲	Dagger2 21 hours ago \| parent [-]
		There has to be one somewhere. In my case it's running on my router, but your ISP can do it at their end, and since you can use any /96 including public ones, it's also possible for anyone to run one: `$ dig A +short github.com 140.82.112.4 $ dig AAAA +short github.com 64:ff9b::8c52:7004 $ dig AAAA +short github.com @2a01:4f8:c2c:123f::1 2a01:4f8:c2c:123f:64:5:8c52:7004 2a00:1098:2c::5:8c52:7004 2a00:1098:2b::1:8c52:7004` Note the embedded 140.82.112.4 in the last four bytes of the v6 addresses, which you can write in v4 format if you want: `$ getent ahosts 2a00:1098:2b::1:140.82.112.4 2a00:1098:2b::1:8c52:7004 STREAM 2a00:1098:2b::1:140.82.112.4`