{"kind":"host","input":"www2.web4u.cz","report":{"host":"www2.web4u.cz","checkedAt":"2026-11-15T18:14:21.113Z","a":{"status":"found","values":["81.91.86.26"],"ttl":60,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only"},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"www2.web4u.cz has no AAAA record."},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"No MX records, so mail goes to the domain's own address (implicit MX). It has no AAAA record."},{"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":"ns.web4u.cz","ipv6":true},{"host":"ns2.web4u.cz","ipv6":true}]}]},"receiptId":"q7lL5XLeZe","reused":true,"measuredAt":"2026-11-15T18:14:21.549Z"}