开了一个MC服，域名是
m.i.n.e.c.r.a.f.t.1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f14.6d10.7s2.7p6.d.4.e.e.0.4.8.0.6.0.4.2.ip6.arpa
$ dig -x 2406:840:ee4d:ffff::1
...
;; ANSWER SECTION:
... IN PTR m.i.n.e.c.r.a.f.t.1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6.5f14.6d10.7s2.7p6.d.4.e.e.0.4.8.0.6.0.4.2.ip6.arpa.
...