{"kind":"host","input":"nethost.cz","report":{"host":"nethost.cz","checkedAt":"2026-11-14T19:13:56.033Z","a":{"status":"found","values":["93.185.108.254"],"ttl":864,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.nethost.cz","a":{"status":"found","values":["146.59.3.180","51.38.99.173","37.187.45.2"],"ttl":600,"via":"Cloudflare","cname":["20781-4d7511c3dcbd55bdf858.spongefinger.com"]},"aaaa":{"status":"found","values":["2001:41d0:404:200::86e3","2001:41d0:601:1100::3792","2001:41d0:701:1100::4d2e"],"ttl":600,"via":"Cloudflare","cname":["20781-4d7511c3dcbd55bdf858.spongefinger.com"]},"verdict":"dual-stack"}},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"nethost.cz has no AAAA record."},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.nethost.cz has 3 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2001:41d0:404:200::86e3","result":"answers","port":443},{"address":"2001:41d0:601:1100::3792","result":"answers","port":443},{"address":"2001:41d0:701:1100::4d2e","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":"mail-prox-relay-a3x57.nethost.cz","ipv6":false},{"host":"mail-prox-relay-q98d7.nethost.cz","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"3 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"dns.nethost.cz","ipv6":true},{"host":"pns.nethost.cz","ipv6":false},{"host":"sns.nethost.sk","ipv6":true},{"host":"tns.nethost.eu","ipv6":true}]}]},"receiptId":"hek5PjBJmC","reused":true,"measuredAt":"2026-11-14T19:13:56.676Z"}