{"kind":"host","input":"santanu.bio","report":{"host":"santanu.bio","checkedAt":"2026-11-03T10:11:26.184Z","a":{"status":"found","values":["74.208.236.208"],"ttl":3600,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2607:f1c0:100f:f000::200"],"ttl":3600,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.santanu.bio","a":{"status":"found","values":["74.208.236.208"],"ttl":3600,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2607:f1c0:100f:f000::200"],"ttl":3600,"via":"Cloudflare","cname":[]},"verdict":"dual-stack"}},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: its mail servers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"santanu.bio has an AAAA record and answers on it.","addresses":[{"address":"2607:f1c0:100f:f000::200","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.santanu.bio has an AAAA record and answers on it.","addresses":[{"address":"2607:f1c0:100f:f000::200","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"None of the mail servers has an AAAA record.","hosts":[{"host":"mx01.ionos.com","ipv6":false},{"host":"mx00.ionos.com","ipv6":false}]},{"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":"ns1068.ui-dns.org","ipv6":true},{"host":"ns1085.ui-dns.com","ipv6":true},{"host":"ns1032.ui-dns.de","ipv6":true},{"host":"ns1117.ui-dns.biz","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 200.","hops":[{"url":"https://santanu.bio/","address":"2607:f1c0:100f:f000::200","status":200,"tls":"valid"}]},"receiptId":"ONPOvftwSA","reused":true,"measuredAt":"2026-11-03T10:11:26.792Z"}