{"domain":"vanderbilt.edu","result":true,"measuredAt":"2026-11-02T17:08:33.729Z","receiptId":"pmCAFyBZw_","answer":{"kind":"host","input":"vanderbilt.edu","report":{"host":"vanderbilt.edu","checkedAt":"2026-11-02T17:08:33.652Z","a":{"status":"found","values":["18.67.65.38","18.67.65.119","18.67.65.116","18.67.65.60"],"ttl":1,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.vanderbilt.edu","a":{"status":"found","values":["18.67.65.116","18.67.65.60","18.67.65.38","18.67.65.119"],"ttl":60,"via":"Cloudflare","cname":["prd.vanderbilt.edu"]},"aaaa":{"status":"absent","via":"Cloudflare","cname":["prd.vanderbilt.edu"]},"verdict":"ipv4-only"}},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"vanderbilt.edu has no AAAA record."},{"key":"www","label":"www over IPv6","status":"fail","detail":"www.vanderbilt.edu has no AAAA record."},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"vanderbilt-edu.mail.protection.outlook.com","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":"ns3.vanderbilt.edu","ipv6":false},{"host":"ns2.vanderbilt.edu","ipv6":false},{"host":"ns4.vanderbilt.edu","ipv6":false},{"host":"ns1.vanderbilt.edu","ipv6":false}]}]}},"states":[{"firstSeen":"2026-11-02T00:13:11.755Z","lastConfirmed":"2026-11-02T17:08:33.729Z","checks":3,"verdict":"ipv4-only","grade":"D","web":"fail","www":"fail","mail":"pass","dns":"fail","secondLook":null}]}