WSPRnet.org resolves to A 69.164.213.205 and AAAA 2600:3c03::f03c:91ff:fe96:829b
Unfortunately, the IPv6 address does not work.
$ telnet -6 2600:3c03::f03c:91ff:fe96:829b 80
Trying 2600:3c03::f03c:91ff:fe96:829b...
^C
$ telnet 69.164.213.205 80
Trying 69.164.213.205...
Connected to 69.164.213.205.
Escape character is '^]'.
-> please fix