{"kind":"host","input":"chat.firmy.cz","report":{"host":"chat.firmy.cz","checkedAt":"2026-11-15T17:54:27.352Z","a":{"status":"found","values":["77.75.76.156"],"ttl":3600,"via":"Cloudflare","cname":["chat.seznam.cz"]},"aaaa":{"status":"found","values":["2a02:598:2::156"],"ttl":3600,"via":"Cloudflare","cname":["chat.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":"chat.firmy.cz has an AAAA record and answers on it.","addresses":[{"address":"2a02:598:2::156","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"No MX records, so mail goes to the domain's own address (implicit MX). It has an 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":"ams.seznam.cz","ipv6":true},{"host":"ans.seznam.cz","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 404.","hops":[{"url":"https://chat.firmy.cz/","address":"2a02:598:2::156","status":404,"tls":"valid"}]},"receiptId":"N9_DXie2hX","reused":true,"measuredAt":"2026-11-15T17:54:28.087Z"}