{"kind":"host","input":"princeton.edu","report":{"host":"princeton.edu","checkedAt":"2026-10-31T21:52:01.594Z","a":{"status":"found","values":["140.180.223.22"],"ttl":1800,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.princeton.edu","a":{"status":"found","values":["104.18.4.101","104.18.5.101"],"ttl":36,"via":"Cloudflare","cname":["www.princeton.edu.cdn.cloudflare.net"]},"aaaa":{"status":"found","values":["2606:4700::6812:465","2606:4700::6812:565"],"ttl":300,"via":"Cloudflare","cname":["www.princeton.edu.cdn.cloudflare.net"]},"verdict":"dual-stack"}},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"princeton.edu has no AAAA record."},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.princeton.edu has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2606:4700::6812:465","result":"answers","port":443},{"address":"2606:4700::6812:565","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":"princeton-edu.mail.protection.outlook.com","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"9 of 9 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns7.dnsmadeeasy.com","ipv6":true},{"host":"a20-65.akam.net","ipv6":true},{"host":"a3-67.akam.net","ipv6":true},{"host":"a24-66.akam.net","ipv6":true},{"host":"ns6.dnsmadeeasy.com","ipv6":true},{"host":"a6-64.akam.net","ipv6":true},{"host":"ns5.dnsmadeeasy.com","ipv6":true},{"host":"a1-158.akam.net","ipv6":true},{"host":"a7-65.akam.net","ipv6":true}]}]},"receiptId":"z-abi69x-f","reused":true,"measuredAt":"2026-10-31T21:52:01.674Z"}