{"kind":"host","input":"ftp.fio.cz","report":{"host":"ftp.fio.cz","checkedAt":"2026-11-05T19:03:23.301Z","a":{"status":"found","values":["92.38.6.12"],"ttl":7200,"via":"Cloudflare","cname":["www1.fio.cz"]},"aaaa":{"status":"absent","via":"Cloudflare","cname":["www1.fio.cz"]},"verdict":"ipv4-only"},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"ftp.fio.cz has no AAAA record."},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"partial","detail":"At least one mail server has no AAAA record (1 of 3 checked do).","hosts":[{"host":"www1.fio.cz","ipv6":false},{"host":"smtp1.fio.cz","ipv6":false},{"host":"smtp2.fio.cz","ipv6":true}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"4 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns1.fio.cz","ipv6":false},{"host":"ns2.fio.cz","ipv6":false},{"host":"dns41.cloudns.net","ipv6":true},{"host":"dns42.cloudns.net","ipv6":true},{"host":"dns43.cloudns.net","ipv6":true},{"host":"dns44.cloudns.net","ipv6":true}]}]},"receiptId":"EX3hT_OWyl","reused":true,"measuredAt":"2026-11-05T19:03:23.725Z"}