公共IPv6的DNS服务器推荐ping6速度排名，阿里最快
一、阿里IPv6 dns
国内首家支持IPv4和IPv6，双端加持，安全快速。
2400:3200::1
ping6 2400:3200::1
PING 2400:3200::1(2400:3200::1) 56 data bytes
64 bytes from 2400:3200::1: icmp_seq=1 ttl=115 time=6.54 ms
64 bytes from 2400:3200::1: icmp_seq=2 ttl=115 time=6.51 ms
64 bytes from 2400:3200::1: icmp_seq=3 ttl=115 time=6.58 ms
2400:3200:baba::1
ping6 2400:3200:baba::1
PING 2400:3200:baba::1(2400:3200:baba::1) 56 data bytes
64 bytes from 2400:3200:baba::1: icmp_seq=1 ttl=115 time=8.00 ms
64 bytes from 2400:3200:baba::1: icmp_seq=2 ttl=115 time=7.88 ms
64 bytes from 2400:3200:baba::1: icmp_seq=3 ttl=115 time=7.83 ms
公共IPv6的DNS服务器ping6速度排名，阿里最快，百度挂了
阿里巴巴ipv6的dns地址
二、天地互连 ipv6 dns
隶属于北京天地互连信息技术有限公司。
240C::6666
ping6 240C::6666
PING 240C::6666(240c::6666) 56 data bytes
64 bytes from 240c::6666: icmp_seq=1 ttl=56 time=13.4 ms
64 bytes from 240c::6666: icmp_seq=2 ttl=56 time=13.4 ms
240C::6644
ping6 240C::6644
PING 240C::6644(240c::6644) 56 data bytes
64 bytes from 240c::6644: icmp_seq=1 ttl=55 time=12.9 ms
64 bytes from 240c::6644: icmp_seq=2 ttl=55 time=13.0 ms
64 bytes from 240c::6644: icmp_seq=3 ttl=55 time=13.0 ms
三、谷歌 vip6 dns
服务器响应可能比较慢。
2001:4860:4860::8888
ping6 2001:4860:4860::8888
PING 2001:4860:4860::8888(2001:4860:4860::8888) 56 data bytes
64 bytes from 2001:4860:4860::8888: icmp_seq=2 ttl=112 time=256 ms
64 bytes from 2001:4860:4860::8888: icmp_seq=3 ttl=112 time=253 ms
64 bytes from 2001:4860:4860::8888: icmp_seq=5 ttl=112 time=259 ms
2001:4860:4860::8844
ping6 2001:4860:4860::8844
PING 2001:4860:4860::8844(2001:4860:4860::8844) 56 data bytes
64 bytes from 2001:4860:4860::8844: icmp_seq=1 ttl=112 time=258 ms
64 bytes from 2001:4860:4860::8844: icmp_seq=2 ttl=112 time=247 ms
64 bytes from 2001:4860:4860::8844: icmp_seq=4 ttl=112 time=254 ms
四、百度ipv6 dns
曾经传说有，试着找了一下，https://dudns.baidu.com/support/localdns/Address/
百度公共DNS采用bgp anycast技术对外提供服务，目前已经接入包括联通、电信、移动、教育网、长城宽带、方正宽带、铁通、华数、世纪互联、东方有线等在内的多个运营商，具有业界一流的网络覆盖以及速度和稳定性体验。
2400:da00::6666
ping6 2400:da00::6666
PING 2400:da00::6666(2400:da00::6666) 56 data bytes
难道禁ping了？再次用dig试试：
$ dig AAAA ipv6.hkzww.com @2400:da00::6666
; <<>> DiG 9.9.4-RedHat-9.9.4-29.el7 <<>> AAAA ipv6.hkzww.com @2400:da00::6666
;; global options: +cmd
;; connection timed out; no servers could be reached
确实解析不出来，百度是个完蛋货。
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