{"kind":"host","input":"univ-paris-diderot.fr","report":{"host":"univ-paris-diderot.fr","checkedAt":"2026-11-01T12:07:32.607Z","a":{"status":"found","values":["81.194.22.239"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2001:660:3301:8008::239"],"ttl":300,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.univ-paris-diderot.fr","a":{"status":"found","values":["81.194.22.239"],"ttl":300,"via":"Cloudflare","cname":["rpnp1.dsi.univ-paris-diderot.fr"]},"aaaa":{"status":"found","values":["2001:660:3301:8008::239"],"ttl":300,"via":"Cloudflare","cname":["rpnp1.dsi.univ-paris-diderot.fr"]},"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":"univ-paris-diderot.fr has an AAAA record and answers on it.","addresses":[{"address":"2001:660:3301:8008::239","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.univ-paris-diderot.fr has an AAAA record and answers on it.","addresses":[{"address":"2001:660:3301:8008::239","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":"mx2.relay.renater.fr","ipv6":false},{"host":"mx1.relay.renater.fr","ipv6":false}]},{"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":"korolev.univ-paris7.fr","ipv6":true},{"host":"shiva.jussieu.fr","ipv6":false},{"host":"potemkin.univ-paris7.fr","ipv6":true}]}]},"https":{"status":"fail","problem":"redirect-no-ipv6","summary":"Redirects to u-paris.fr, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.","hops":[{"url":"https://univ-paris-diderot.fr/","address":"2001:660:3301:8008::239","status":301,"tls":"valid"},{"url":"https://u-paris.fr/","note":"redirects to u-paris.fr, which has no IPv6 address"}]},"receiptId":"3MvFPFONXz","reused":true,"measuredAt":"2026-11-01T12:07:33.568Z"}