{"kind":"host","input":"fda.gov","report":{"host":"fda.gov","checkedAt":"2026-10-31T11:27:14.074Z","a":{"status":"found","values":["23.205.106.69","23.205.106.82","23.205.106.84","23.205.106.88","23.205.106.89"],"ttl":20,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2600:1408:c400:1f::17d4:fbcc","2600:1408:c400:1f::17d4:fbd7"],"ttl":20,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.fda.gov","a":{"status":"found","values":["23.212.251.215","23.212.251.204"],"ttl":20,"via":"Cloudflare","cname":["prod-resolver-www-sni.fda.gov.akadns.net","www-sni.fda.gov.edgekey.net","e302277.dscb.akamaiedge.net"]},"aaaa":{"status":"found","values":["2600:1408:c400:d::17cd:6a59","2600:1408:c400:d::17cd:6a58"],"ttl":20,"via":"Cloudflare","cname":["prod-resolver-www-sni.fda.gov.akadns.net","www-sni.fda.gov.edgekey.net","e302277.dscb.akamaiedge.net"]},"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":"fda.gov has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2600:1408:c400:1f::17d4:fbcc","result":"answers","port":443},{"address":"2600:1408:c400:1f::17d4:fbd7","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.fda.gov has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2600:1408:c400:d::17cd:6a59","result":"answers","port":443},{"address":"2600:1408:c400:d::17cd:6a58","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"smtp6.fda.gov","ipv6":true},{"host":"smtp7.fda.gov","ipv6":true},{"host":"smtp8.fda.gov","ipv6":true},{"host":"smtp9.fda.gov","ipv6":true}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"6 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"a2-65.akam.net","ipv6":true},{"host":"a7-67.akam.net","ipv6":true},{"host":"a1-242.akam.net","ipv6":true},{"host":"a13-64.akam.net","ipv6":true},{"host":"a20-65.akam.net","ipv6":true},{"host":"a24-66.akam.net","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate after 2 redirects: HTTP 404.","hops":[{"url":"https://fda.gov/","address":"2600:1408:c400:1f::17d4:fbcc","status":302,"tls":"valid"},{"url":"https://fda.gov/apology_objects/abuse-detection-apology.html","address":"2600:1408:c400:1f::17d4:fbcc","status":301,"tls":"valid"},{"url":"https://www.fda.gov/apology_objects/abuse-detection-apology.html","address":"2600:1408:c400:d::17cd:6a59","status":404,"tls":"valid"}]},"receiptId":"nWWHA1z3ie"}