{"kind":"host","input":"autodiscover.rbx.com","report":{"host":"autodiscover.rbx.com","checkedAt":"2026-11-15T17:48:18.171Z","a":{"status":"found","values":["52.96.88.56","52.96.109.200","52.96.111.40","52.96.111.72","52.96.111.88","52.96.182.104","52.96.183.40","52.96.230.168"],"ttl":10,"via":"Cloudflare","cname":["autodiscover.outlook.com","autodiscover.outlook.cloud.microsoft","atm.autodiscover.mira.tm.svc.cloud.microsoft"]},"aaaa":{"status":"found","values":["2603:1036:207:457::8","2603:1036:207:45a::8","2603:1036:302:40e0::8","2603:1036:302:415c::8","2603:1036:302:4842::8","2603:1036:302:48b4::8","2603:1036:302:505c::8","2603:1036:302:505d::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":"B","summary":"Works over IPv6, with one gap: its nameservers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"autodiscover.rbx.com has 4 IPv6 addresses and answers on every one we tested (4 more not tested).","addresses":[{"address":"2603:1036:207:457::8","result":"answers","port":80},{"address":"2603:1036:207:45a::8","result":"answers","port":80},{"address":"2603:1036:302:40e0::8","result":"answers","port":80},{"address":"2603:1036:302:415c::8","result":"answers","port":80},{"address":"2603:1036:302:4842::8","result":"not tested"},{"address":"2603:1036:302:48b4::8","result":"not tested"},{"address":"2603:1036:302:505c::8","result":"not tested"},{"address":"2603:1036:302:505d::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":"fail","detail":"No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.","hosts":[{"host":"nspx1.roblox.com","ipv6":false},{"host":"nspx2.roblox.net","ipv6":false},{"host":"nspx3.roblox.us","ipv6":false},{"host":"nspx4.roblox.co.uk","ipv6":false}]}]},"https":{"status":"unknown","summary":"autodiscover.rbx.com didn't complete an HTTPS request over IPv6 (ECONNREFUSED).","hops":[{"url":"https://autodiscover.rbx.com/","address":"2603:1036:207:457::8","note":"ECONNREFUSED"}]},"receiptId":"F1SrpVwI8l","reused":true,"measuredAt":"2026-11-15T17:48:18.253Z"}