{"kind":"host","input":"london.ac.uk","report":{"host":"london.ac.uk","checkedAt":"2026-11-15T17:52:35.508Z","a":{"status":"found","values":["51.132.32.57"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.london.ac.uk","a":{"status":"found","values":["104.20.37.86","172.66.144.87"],"ttl":54,"via":"Cloudflare","cname":["www.london.ac.uk.cdn.cloudflare.net"]},"aaaa":{"status":"found","values":["2606:4700:10::6814:2556","2606:4700:10::ac42:9057"],"ttl":300,"via":"Cloudflare","cname":["www.london.ac.uk.cdn.cloudflare.net"]},"verdict":"dual-stack"}},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"london.ac.uk has no AAAA record."},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.london.ac.uk has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2606:4700:10::6814:2556","result":"answers","port":443},{"address":"2606:4700:10::ac42:9057","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"london-ac-uk.mail.protection.outlook.com","ipv6":true}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"1 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns2.ja.net","ipv6":true},{"host":"ns1.ulcc.ac.uk","ipv6":false},{"host":"ns0.ulcc.ac.uk","ipv6":false}]}]},"receiptId":"Cj1y9M95yB","reused":true,"measuredAt":"2026-11-15T17:52:35.756Z"}