{"kind":"host","input":"autodiscover.cdu.de","report":{"host":"autodiscover.cdu.de","checkedAt":"2026-11-15T17:39:45.236Z","a":{"status":"found","values":["40.104.16.232","40.104.46.24","40.104.47.104","52.96.19.88","52.96.87.232","52.96.109.248","52.96.182.120","52.96.242.24"],"ttl":10,"via":"Cloudflare","cname":["autodiscover.outlook.com","autodiscover.outlook.cloud.microsoft","atm.autodiscover.mira.tm.svc.cloud.microsoft"]},"aaaa":{"status":"found","values":["2603:1036:207:458::8","2603:1036:302:880::8","2603:1036:302:4155::8","2603:1036:302:415a::8","2603:1036:302:415c::8","2603:1036:302:415e::8","2603:1036:302:505a::8","2603:1036:302:505e::8"],"ttl":10,"via":"Cloudflare","cname":["autodiscover.outlook.com","autodiscover.outlook.cloud.microsoft","atm.autodiscover.mira.tm.svc.cloud.microsoft"]},"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":"autodiscover.cdu.de has 4 IPv6 addresses and answers on every one we tested (4 more not tested).","addresses":[{"address":"2603:1036:207:458::8","result":"answers","port":80},{"address":"2603:1036:302:880::8","result":"answers","port":80},{"address":"2603:1036:302:4155::8","result":"answers","port":80},{"address":"2603:1036:302:415a::8","result":"answers","port":80},{"address":"2603:1036:302:415c::8","result":"not tested"},{"address":"2603:1036:302:415e::8","result":"not tested"},{"address":"2603:1036:302:505a::8","result":"not tested"},{"address":"2603:1036:302:505e::8","result":"not tested"}]},{"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":"3 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns1.cdu.de","ipv6":false},{"host":"ns1.arcor-ip.de","ipv6":true},{"host":"ns2.arcor-ip.de","ipv6":true},{"host":"ns3.arcor-ip.de","ipv6":true}]}]},"https":{"status":"unknown","summary":"autodiscover.cdu.de didn't complete an HTTPS request over IPv6 (ECONNREFUSED).","hops":[{"url":"https://autodiscover.cdu.de/","address":"2603:1036:207:458::8","note":"ECONNREFUSED"}]},"receiptId":"aLqj4eWEBJ","reused":true,"measuredAt":"2026-11-15T17:39:45.631Z"}