{"domain":"khanacademy.org","result":true,"measuredAt":"2026-11-02T14:51:31.360Z","receiptId":"WuIYQ2nM2A","answer":{"kind":"host","input":"khanacademy.org","report":{"host":"khanacademy.org","checkedAt":"2026-11-02T14:51:31.330Z","a":{"status":"found","values":["3.167.88.27","3.167.88.54","3.167.88.86","3.167.88.13"],"ttl":60,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.khanacademy.org","a":{"status":"found","values":["151.101.129.42","151.101.193.42","151.101.1.42","151.101.65.42"],"ttl":43,"via":"Cloudflare","cname":["prod.khan.map.fastly.net"]},"aaaa":{"status":"absent","via":"Cloudflare","cname":["prod.khan.map.fastly.net"]},"verdict":"ipv4-only"}},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"khanacademy.org has no AAAA record."},{"key":"www","label":"www over IPv6","status":"fail","detail":"www.khanacademy.org has no AAAA record."},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"aspmx.l.google.com","ipv6":true},{"host":"aspmx2.googlemail.com","ipv6":true},{"host":"aspmx3.googlemail.com","ipv6":true},{"host":"alt1.aspmx.l.google.com","ipv6":true},{"host":"alt2.aspmx.l.google.com","ipv6":true}]},{"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":"ns-125.awsdns-15.com","ipv6":true},{"host":"ns-1489.awsdns-58.org","ipv6":true},{"host":"ns-1664.awsdns-16.co.uk","ipv6":true},{"host":"ns-798.awsdns-35.net","ipv6":true}]}]}},"states":[{"firstSeen":"2026-11-02T14:51:31.360Z","lastConfirmed":"2026-11-02T14:51:31.360Z","checks":1,"verdict":"ipv4-only","grade":"D","web":"fail","www":"fail","mail":"pass","dns":"pass","secondLook":null}]}