{"kind":"host","input":"ftp.planeo.cz","report":{"host":"ftp.planeo.cz","checkedAt":"2026-11-15T17:02:32.724Z","a":{"status":"found","values":["217.198.116.188"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2a00:19a0:3:74:0:d9c6:74bc:1"],"ttl":300,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.ftp.planeo.cz","a":{"status":"absent","via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"no-address"}},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: www doesn't fully work over IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"ftp.planeo.cz has an AAAA record and answers on it.","addresses":[{"address":"2a00:19a0:3:74:0:d9c6:74bc:1","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"fail","detail":"www.ftp.planeo.cz has no AAAA record."},{"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":"duke.ns.cloudflare.com","ipv6":true},{"host":"teagan.ns.cloudflare.com","ipv6":true}]}]},"https":{"status":"fail","problem":"certificate","summary":"The certificate served over IPv6 at 2a00:19a0:3:74:0:d9c6:74bc:1 isn't valid for ftp.planeo.cz: DEPTH_ZERO_SELF_SIGNED_CERT.","hops":[{"url":"https://ftp.planeo.cz/","address":"2a00:19a0:3:74:0:d9c6:74bc:1","tls":"DEPTH_ZERO_SELF_SIGNED_CERT"}]},"receiptId":"dgKlil5KT5","reused":true,"measuredAt":"2026-11-15T17:02:33.022Z"}