{"kind":"host","input":"autoconfig.firmy.cz","report":{"host":"autoconfig.firmy.cz","checkedAt":"2026-11-15T18:18:33.416Z","a":{"status":"found","values":["77.75.78.196"],"ttl":3600,"via":"Cloudflare","cname":["email.seznam.cz"]},"aaaa":{"status":"found","values":["2a02:598:a::78:196"],"ttl":3600,"via":"Cloudflare","cname":["email.seznam.cz"]},"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":"autoconfig.firmy.cz has an AAAA record and answers on it.","addresses":[{"address":"2a02:598:a::78:196","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"mx1.seznam.cz","ipv6":true},{"host":"mx2.seznam.cz","ipv6":true}]},{"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":"ams.seznam.cz","ipv6":true},{"host":"ans.seznam.cz","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate after 2 redirects: HTTP 200.","hops":[{"url":"https://autoconfig.firmy.cz/","address":"2a02:598:a::78:196","status":302,"tls":"valid"},{"url":"https://email.seznam.cz/","address":"2a02:598:a::78:196","status":302,"tls":"valid"},{"url":"https://login.seznam.cz/?returnURL=https%3a%2f%2femail.seznam.cz%2f&serviceId=email","address":"2a02:598:a::78:104","status":200,"tls":"valid"}]},"receiptId":"VeQWI6tNDK","reused":true,"measuredAt":"2026-11-15T18:18:34.920Z"}