{"kind":"host","input":"tandfonline.com","report":{"host":"tandfonline.com","checkedAt":"2026-10-31T09:39:22.125Z","a":{"status":"found","values":["104.18.39.123","172.64.148.133"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2a06:98c1:310a::6812:277b","2606:4700:4401::ac40:9485"],"ttl":300,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.tandfonline.com","a":{"status":"found","values":["104.18.39.123","172.64.148.133"],"ttl":183,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2606:4700:4401::ac40:9485","2a06:98c1:310a::6812:277b"],"ttl":51,"via":"Cloudflare","cname":[]},"verdict":"dual-stack"}},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: its mail servers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"tandfonline.com has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2a06:98c1:310a::6812:277b","result":"answers","port":443},{"address":"2606:4700:4401::ac40:9485","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.tandfonline.com has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2606:4700:4401::ac40:9485","result":"answers","port":443},{"address":"2a06:98c1:310a::6812:277b","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":"us-smtp-inbound-1.mimecast.com","ipv6":false},{"host":"us-smtp-inbound-2.mimecast.com","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"lee.ns.cloudflare.com","ipv6":true},{"host":"rachel.ns.cloudflare.com","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 403.","hops":[{"url":"https://tandfonline.com/","address":"2a06:98c1:310a::6812:277b","status":403,"tls":"valid"}]},"receiptId":"GatcF7tNN_"}