Some subdomains were pointed to such DNS servers to be able quickly remember them simply by nslookup
Trex.fi (http://www.trex.fi/2011/dns64.html):
IP Addresses:
- 2001:67c:2b0::4
- 2001:67c:2b0::6
Pointed subdomain: trex-fi.dns64.nekra.eu.org
Usage:
- to remember ip addresses:
> nslookup trex-fi.dns64.nekra.eu.org
- to just check any domain over it:
> nslookup github.com trex-fi.dns64.nekra.eu.org
Public NAT64 service (https://nat64.net/):
IP Addresses:
- 2a00:1098:2b::1
- 2a01:4f8:c2c:123f::1
- 2a01:4f9:c010:3f02::1
Pointed subdomain: nat64-net.dns64.nekra.eu.org
Usage:
- to remember ip addresses:
> nslookup nat64-net.dns64.nekra.eu.org
- to just check any domain over it:
> nslookup github.com nat64-net.dns64.nekra.eu.org
If any data is outdated, contact info will be there later.