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6.ipw.cn
www.gov.cn
www.pku.edu.cn
www.makiki.ca
ipv6test.google.com
2a00:801:f::195
ipv6c.tlund.se
ip6only.me
v6.testmyipv6.com
ipv6.icanhazip.com
ipv6-only.bsm.nl