{"kind":"host","input":"ubuntu.com","report":{"host":"ubuntu.com","checkedAt":"2026-10-30T21:15:04.760Z","a":{"status":"found","values":["185.125.190.29","185.125.190.21","185.125.190.20"],"ttl":12,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2620:2d:4000:1::26","2620:2d:4000:1::28","2620:2d:4000:1::27"],"ttl":60,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.ubuntu.com","a":{"status":"found","values":["185.125.190.29","185.125.190.21","185.125.190.20"],"ttl":4,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2620:2d:4000:1::28","2620:2d:4000:1::26","2620:2d:4000:1::27"],"ttl":60,"via":"Cloudflare","cname":[]},"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":"ubuntu.com has 3 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2620:2d:4000:1::26","result":"answers","port":443},{"address":"2620:2d:4000:1::28","result":"answers","port":443},{"address":"2620:2d:4000:1::27","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.ubuntu.com has 3 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2620:2d:4000:1::28","result":"answers","port":443},{"address":"2620:2d:4000:1::26","result":"answers","port":443},{"address":"2620:2d:4000:1::27","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"None of the mail servers has an AAAA record.","hosts":[{"host":"mx.ubuntu.com","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"2 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns1.canonical.com","ipv6":true},{"host":"ns2.canonical.com","ipv6":true},{"host":"ns3.canonical.com","ipv6":false}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 200.","hops":[{"url":"https://ubuntu.com/","address":"2620:2d:4000:1::26","status":200,"tls":"valid"}]},"receiptId":"UJifuuygsK"}