{"kind":"host","input":"systemsinfo.org","report":{"host":"systemsinfo.org","checkedAt":"2026-11-13T22:35:28.554Z","a":{"status":"found","values":["172.67.220.75","104.21.53.239"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2606:4700:3037::ac43:dc4b","2606:4700:3032::6815:35ef"],"ttl":300,"via":"Cloudflare","cname":[]},"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":"systemsinfo.org has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2606:4700:3037::ac43:dc4b","result":"answers","port":443},{"address":"2606:4700:3032::6815:35ef","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"None of the mail servers has an AAAA record.","hosts":[{"host":"mx01.mail.icloud.com","ipv6":false},{"host":"mx02.mail.icloud.com","ipv6":false}]},{"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":"harley.ns.cloudflare.com","ipv6":true},{"host":"molly.ns.cloudflare.com","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 403.","hops":[{"url":"https://systemsinfo.org/","address":"2606:4700:3037::ac43:dc4b","status":403,"tls":"valid"}]},"receiptId":"e97cnf7Men","reused":true,"measuredAt":"2026-11-13T22:35:28.643Z"}