{"kind":"host","input":"ampproject.org","report":{"host":"ampproject.org","checkedAt":"2026-10-30T22:04:32.511Z","a":{"status":"found","values":["192.178.218.138","192.178.218.113","192.178.218.102","192.178.218.139","192.178.218.101","192.178.218.100"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2607:f8b0:4004:c09::64","2607:f8b0:4004:c09::8b","2607:f8b0:4004:c09::65","2607:f8b0:4004:c09::66"],"ttl":300,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.ampproject.org","a":{"status":"found","values":["199.36.158.100"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only"}},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: www doesn't fully work over IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"ampproject.org has 4 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2607:f8b0:4004:c09::64","result":"answers","port":443},{"address":"2607:f8b0:4004:c09::8b","result":"answers","port":443},{"address":"2607:f8b0:4004:c09::65","result":"answers","port":443},{"address":"2607:f8b0:4004:c09::66","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"fail","detail":"www.ampproject.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":"smtp.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":"ns3.google.com","ipv6":true},{"host":"ns2.google.com","ipv6":true},{"host":"ns4.google.com","ipv6":true},{"host":"ns1.google.com","ipv6":true}]}]},"https":{"status":"fail","problem":"redirect-no-ipv6","summary":"Redirects to www.ampproject.org, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.","hops":[{"url":"https://ampproject.org/","address":"2607:f8b0:4004:c09::64","status":302,"tls":"valid"},{"url":"https://www.ampproject.org/","note":"redirects to www.ampproject.org, which has no IPv6 address"}]},"receiptId":"7cVkaBEKQ0","reused":true,"measuredAt":"2026-10-30T22:04:32.533Z"}