公共DNS

阿里云
IPv4:223.5.5.5 / 223.6.6.6
IPv6:2400:3200::1 / 2400:3200:baba::1

Cloudflare
IPv4:1.1.1.1 / 1.0.0.1
IPv6:2001:2001:: / 2001:2001:2001::

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