{"kind":"host","input":"assets.tcu.edu","report":{"host":"assets.tcu.edu","checkedAt":"2026-11-03T12:07:17.296Z","a":{"status":"found","values":["18.154.227.11","18.154.227.9","18.154.227.87","18.154.227.21"],"ttl":60,"via":"Cloudflare","cname":["d15kvublqksy0b.cloudfront.net"]},"aaaa":{"status":"found","values":["2600:9000:2501:ba00:11:9f39:cac0:93a1","2600:9000:2501:6600:11:9f39:cac0:93a1","2600:9000:2501:1e00:11:9f39:cac0:93a1","2600:9000:2501:3200:11:9f39:cac0:93a1","2600:9000:2501:c800:11:9f39:cac0:93a1","2600:9000:2501:8000:11:9f39:cac0:93a1","2600:9000:2501:4400:11:9f39:cac0:93a1","2600:9000:2501:d600:11:9f39:cac0:93a1"],"ttl":60,"via":"Cloudflare","cname":["d15kvublqksy0b.cloudfront.net"]},"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":"assets.tcu.edu has 4 IPv6 addresses and answers on every one we tested (4 more not tested).","addresses":[{"address":"2600:9000:2501:ba00:11:9f39:cac0:93a1","result":"answers","port":443},{"address":"2600:9000:2501:6600:11:9f39:cac0:93a1","result":"answers","port":443},{"address":"2600:9000:2501:1e00:11:9f39:cac0:93a1","result":"answers","port":443},{"address":"2600:9000:2501:3200:11:9f39:cac0:93a1","result":"answers","port":443},{"address":"2600:9000:2501:c800:11:9f39:cac0:93a1","result":"not tested"},{"address":"2600:9000:2501:8000:11:9f39:cac0:93a1","result":"not tested"},{"address":"2600:9000:2501:4400:11:9f39:cac0:93a1","result":"not tested"},{"address":"2600:9000:2501:d600:11:9f39:cac0:93a1","result":"not tested"}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record."},{"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.tcu.edu","ipv6":false},{"host":"ns99.tcu.edu","ipv6":false}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 200.","hops":[{"url":"https://assets.tcu.edu/","address":"2600:9000:2501:ba00:11:9f39:cac0:93a1","status":200,"tls":"valid"}]},"receiptId":"RGqNpo_47a","reused":true,"measuredAt":"2026-11-03T12:07:17.486Z"}