{"domain":"feedburner.com","result":true,"measuredAt":"2026-11-02T09:08:23.937Z","receiptId":"acHT14qQxL","answer":{"kind":"host","input":"feedburner.com","report":{"host":"feedburner.com","checkedAt":"2026-11-02T09:08:23.849Z","a":{"status":"found","values":["172.253.122.101","172.253.122.100","172.253.122.138","172.253.122.139","172.253.122.113","172.253.122.102"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2607:f8b0:4004:c1f::8a","2607:f8b0:4004:c1f::71","2607:f8b0:4004:c1f::8b","2607:f8b0:4004:c1f::65"],"ttl":300,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.feedburner.com","a":{"status":"found","values":["173.194.45.102","173.194.45.113","173.194.45.138","173.194.45.100","173.194.45.101","173.194.45.139"],"ttl":300,"via":"Cloudflare","cname":["www3.l.google.com"]},"aaaa":{"status":"found","values":["2607:f8b0:4004:c21::64","2607:f8b0:4004:c21::71","2607:f8b0:4004:c21::8a","2607:f8b0:4004:c21::65"],"ttl":300,"via":"Cloudflare","cname":["www3.l.google.com"]},"verdict":"dual-stack"}},"readiness":{"grade":"A","summary":"Website, mail and DNS all work over IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"feedburner.com has 4 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2607:f8b0:4004:c1f::8a","result":"answers","port":443},{"address":"2607:f8b0:4004:c1f::71","result":"answers","port":443},{"address":"2607:f8b0:4004:c1f::8b","result":"answers","port":443},{"address":"2607:f8b0:4004:c1f::65","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.feedburner.com has 4 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2607:f8b0:4004:c21::64","result":"answers","port":443},{"address":"2607:f8b0:4004:c21::71","result":"answers","port":443},{"address":"2607:f8b0:4004:c21::8a","result":"answers","port":443},{"address":"2607:f8b0:4004:c21::65","result":"answers","port":443}]},{"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":"ns4.google.com","ipv6":true},{"host":"ns1.google.com","ipv6":true},{"host":"ns3.google.com","ipv6":true},{"host":"ns2.google.com","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.","hops":[{"url":"https://feedburner.com/","address":"2607:f8b0:4004:c1f::8a","status":301,"tls":"valid"},{"url":"https://feedburner.google.com/","address":"2607:f8b0:4004:c2f::64","status":200,"tls":"valid"}]}},"states":[{"firstSeen":"2026-11-02T09:08:23.937Z","lastConfirmed":"2026-11-02T09:08:23.937Z","checks":1,"verdict":"dual-stack","grade":"A","web":"pass","www":"pass","mail":"pass","dns":"pass","secondLook":null}]}