{"kind":"host","input":"cra.cz","report":{"host":"cra.cz","checkedAt":"2026-11-04T13:03:02.594Z","a":{"status":"found","values":["82.99.159.78"],"ttl":3600,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2a02:a40:200:3955::78"],"ttl":3600,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.cra.cz","a":{"status":"found","values":["82.99.159.78"],"ttl":3600,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2a02:a40:200:3955::78"],"ttl":3600,"via":"Cloudflare","cname":[]},"verdict":"dual-stack"}},"readiness":{"grade":"A","summary":"Website, mail and DNS all work over IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"cra.cz has an AAAA record and answers on it.","addresses":[{"address":"2a02:a40:200:3955::78","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.cra.cz has an AAAA record and answers on it.","addresses":[{"address":"2a02:a40:200:3955::78","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"cra-cz.mail.protection.outlook.com","ipv6":true}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns.bluetone.cz","ipv6":true},{"host":"ns1.bluetone.cz","ipv6":true},{"host":"ns2.bluetone.cz","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate after 1 redirect: HTTP 403.","hops":[{"url":"https://cra.cz/","address":"2a02:a40:200:3955::78","status":301,"tls":"valid"},{"url":"https://www.cra.cz/","address":"2a02:a40:200:3955::78","status":403,"tls":"valid"}]},"receiptId":"duiigl_-Nd","reused":true,"measuredAt":"2026-11-04T13:03:03.177Z"}