{"kind":"host","input":"criteo.com","report":{"host":"criteo.com","checkedAt":"2026-10-31T04:24:36.123Z","a":{"status":"found","values":["23.185.0.4"],"ttl":60,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2620:12a:8000::4","2620:12a:8001::4"],"ttl":60,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.criteo.com","a":{"status":"found","values":["23.185.0.4"],"ttl":3,"via":"Cloudflare","cname":["criteo.com"]},"aaaa":{"status":"found","values":["2620:12a:8000::4","2620:12a:8001::4"],"ttl":30,"via":"Cloudflare","cname":["criteo.com"]},"verdict":"dual-stack"}},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: its nameservers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"criteo.com has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2620:12a:8000::4","result":"answers","port":443},{"address":"2620:12a:8001::4","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.criteo.com has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2620:12a:8000::4","result":"answers","port":443},{"address":"2620:12a:8001::4","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"criteo-com.o-v1.mx.microsoft","ipv6":true}]},{"key":"dns","label":"Nameservers have IPv6","status":"fail","detail":"No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.","hosts":[{"host":"ns1.criteo.com","ipv6":false},{"host":"ns2.criteo.com","ipv6":false}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.","hops":[{"url":"https://criteo.com/","address":"2620:12a:8000::4","status":301,"tls":"valid"},{"url":"https://www.criteo.com/","address":"2620:12a:8000::4","status":200,"tls":"valid"}]},"receiptId":"JherxdCKEn"}