{"kind":"host","input":"xundns.com","report":{"host":"xundns.com","checkedAt":"2026-11-01T12:58:08.289Z","a":{"status":"found","values":["83.229.124.96","154.9.25.113","38.207.179.237"],"ttl":600,"via":"Cloudflare","cname":["307527401113129984.url.xunurl.com"]},"aaaa":{"status":"found","values":["2001:df1:7880:101::268","2001:df1:7880:100::1ee"],"ttl":600,"via":"Cloudflare","cname":["307527401113129984.url.xunurl.com"]},"verdict":"dual-stack","www":{"host":"www.xundns.com","a":{"status":"found","values":["38.207.179.237","83.229.124.96","154.9.25.113"],"ttl":600,"via":"Cloudflare","cname":["307527339880223744.url.xunurl.com"]},"aaaa":{"status":"found","values":["2001:df1:7880:100::1ee","2001:df1:7880:101::268"],"ttl":600,"via":"Cloudflare","cname":["307527339880223744.url.xunurl.com"]},"verdict":"dual-stack"}},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: its mail servers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"xundns.com has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2001:df1:7880:101::268","result":"answers","port":80},{"address":"2001:df1:7880:100::1ee","result":"answers","port":80}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.xundns.com has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2001:df1:7880:100::1ee","result":"answers","port":80},{"address":"2001:df1:7880:101::268","result":"answers","port":80}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"None of the mail servers has an AAAA record.","hosts":[{"host":"mx1.feishu.cn","ipv6":false},{"host":"mx3.feishu.cn","ipv6":false},{"host":"mx2.feishu.cn","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"u2.xundns.com","ipv6":true},{"host":"u1.xundns.com","ipv6":true}]}]},"https":{"status":"unknown","summary":"xundns.com didn't complete an HTTPS request over IPv6 (ECONNREFUSED).","hops":[{"url":"https://xundns.com/","address":"2001:df1:7880:101::268","note":"ECONNREFUSED"}]},"receiptId":"NkJxs-XtHJ","reused":true,"measuredAt":"2026-11-01T12:58:08.872Z"}