{"kind":"host","input":"ftp.ucsd.edu","report":{"host":"ftp.ucsd.edu","checkedAt":"2026-10-31T14:51:56.091Z","a":{"status":"found","values":["132.239.1.12"],"ttl":86400,"via":"Cloudflare","cname":["mirror.ucsd.edu"]},"aaaa":{"status":"found","values":["2607:f720:300:202::12"],"ttl":86400,"via":"Cloudflare","cname":["mirror.ucsd.edu"]},"verdict":"dual-stack"},"readiness":{"grade":"F","summary":"Publishes IPv6 but doesn't answer on it — worse than having none.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"broken","detail":"ftp.ucsd.edu has an AAAA record, but nothing answered on ports 443 or 80. IPv6 visitors wait for a timeout before falling back to IPv4.","addresses":[{"address":"2607:f720:300:202::12","result":"no answer"}]},{"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":"pass","detail":"2 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns-auth1.ucsd.edu","ipv6":false},{"host":"ns-auth3.ucsd.edu","ipv6":true},{"host":"ns-auth2.ucsd.edu","ipv6":true}]}]},"receiptId":"97J7fb8OjY"}