{"kind":"host","input":"classlink.com","report":{"host":"classlink.com","checkedAt":"2026-10-31T12:23:25.094Z","a":{"status":"found","values":["198.202.211.1"],"ttl":60,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.classlink.com","a":{"status":"found","values":["198.202.211.1"],"ttl":60,"via":"Cloudflare","cname":["cdn.webflow.com"]},"aaaa":{"status":"found","values":["2620:cb:2000::1"],"ttl":60,"via":"Cloudflare","cname":["cdn.webflow.com"]},"verdict":"dual-stack"}},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"classlink.com has no AAAA record."},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.classlink.com has an AAAA record and answers on it.","addresses":[{"address":"2620:cb:2000::1","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"classlink-com.mail.protection.outlook.com","ipv6":true}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns-261.awsdns-32.com","ipv6":true},{"host":"ns-828.awsdns-39.net","ipv6":true},{"host":"ns-1522.awsdns-62.org","ipv6":true},{"host":"ns-2026.awsdns-61.co.uk","ipv6":true}]}]},"receiptId":"btq4RflZNu"}