mango.itojun.org [210.155.141.200] [2001:2f0:0:8800::1:1] [2001:2f0:0:8800:226:2dff:fe0b:4311]
edns.jp ipv6samurais.com itojun.org kame.net m-root-servers.org m-root.net t-lex.net