{"kind":"host","input":"spamhaus.org","report":{"host":"spamhaus.org","checkedAt":"2026-10-31T19:09:25.506Z","a":{"status":"found","values":["3.126.246.180"],"ttl":7200,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2a05:d014:1bf:db01:bbc8:62e2:948e:6bf4"],"ttl":7200,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.spamhaus.org","a":{"status":"found","values":["104.16.198.238","104.16.199.238"],"ttl":60,"via":"Cloudflare","cname":["www.spamhaus.org.cdn.cloudflare.net"]},"aaaa":{"status":"absent","via":"Cloudflare","cname":["www.spamhaus.org.cdn.cloudflare.net"]},"verdict":"ipv4-only"}},"readiness":{"grade":"C","summary":"Works over IPv6, with gaps: www doesn't fully work over IPv6; its mail servers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"spamhaus.org has an AAAA record and answers on it.","addresses":[{"address":"2a05:d014:1bf:db01:bbc8:62e2:948e:6bf4","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"fail","detail":"www.spamhaus.org has no AAAA record."},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"None of the mail servers has an AAAA record.","hosts":[{"host":"mx.spamhaus.org","ipv6":false},{"host":"bmx.spamhaus.org","ipv6":false}]},{"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":"musashi.spamhaus.com","ipv6":true},{"host":"musashi.spamhaus.net","ipv6":true},{"host":"musashi.spamhaus.org","ipv6":true},{"host":"hideyoshi.spamhaus.com","ipv6":true},{"host":"hideyoshi.spamhaus.net","ipv6":true},{"host":"hideyoshi.spamhaus.org","ipv6":true}]}]},"https":{"status":"fail","problem":"redirect-no-ipv6","summary":"Redirects to www.spamhaus.org, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.","hops":[{"url":"https://spamhaus.org/","address":"2a05:d014:1bf:db01:bbc8:62e2:948e:6bf4","status":301,"tls":"valid"},{"url":"https://www.spamhaus.org/","note":"redirects to www.spamhaus.org, which has no IPv6 address"}]},"receiptId":"eDNTCjzqk1"}