{"kind":"host","input":"windows.com","report":{"host":"windows.com","checkedAt":"2026-10-30T20:23:35.193Z","a":{"status":"found","values":["20.112.250.133","20.236.44.162","20.231.239.246","20.70.246.20","20.76.201.171"],"ttl":733,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2603:1030:20e:3::23c","2603:1030:b:3::152","2603:1010:3:3::5b","2603:1030:c02:8::14","2603:1020:201:10::10f"],"ttl":1465,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.windows.com","a":{"status":"found","values":["20.76.201.171","20.112.250.133","20.236.44.162","20.231.239.246","20.70.246.20"],"ttl":3600,"via":"Cloudflare","cname":["windows.com"]},"aaaa":{"status":"found","values":["2603:1010:3:3::5b","2603:1030:c02:8::14","2603:1020:201:10::10f","2603:1030:20e:3::23c","2603:1030:b:3::152"],"ttl":3600,"via":"Cloudflare","cname":["windows.com"]},"verdict":"dual-stack"}},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: its mail servers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"windows.com has 4 IPv6 addresses and answers on every one we tested (1 more not tested).","addresses":[{"address":"2603:1030:20e:3::23c","result":"answers","port":443},{"address":"2603:1030:b:3::152","result":"answers","port":443},{"address":"2603:1010:3:3::5b","result":"answers","port":443},{"address":"2603:1030:c02:8::14","result":"answers","port":443},{"address":"2603:1020:201:10::10f","result":"not tested"}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.windows.com has 4 IPv6 addresses and answers on every one we tested (1 more not tested).","addresses":[{"address":"2603:1010:3:3::5b","result":"answers","port":443},{"address":"2603:1030:c02:8::14","result":"answers","port":443},{"address":"2603:1020:201:10::10f","result":"answers","port":443},{"address":"2603:1030:20e:3::23c","result":"answers","port":443},{"address":"2603:1030:b:3::152","result":"not tested"}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"None of the mail servers has an AAAA record.","hosts":[{"host":"mail.windows.com","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns1-205.azure-dns.com","ipv6":true},{"host":"ns2-205.azure-dns.net","ipv6":true},{"host":"ns3-205.azure-dns.org","ipv6":true},{"host":"ns4-205.azure-dns.info","ipv6":true}]}]},"https":{"status":"fail","problem":"redirect-no-ipv6","summary":"Redirects to windows.microsoft.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.","hops":[{"url":"https://windows.com/","address":"2603:1030:20e:3::23c","status":301,"tls":"valid"},{"url":"https://windows.microsoft.com/","note":"redirects to windows.microsoft.com, which has no IPv6 address"}]},"receiptId":"xcYK9lJS75"}