{"kind":"host","input":"vpn.upenn.edu","report":{"host":"vpn.upenn.edu","checkedAt":"2026-11-03T06:02:34.382Z","a":{"status":"found","values":["128.91.172.62"],"ttl":86400,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2607:f470:0:2:0:4:56:3"],"ttl":86400,"via":"Cloudflare","cname":[]},"verdict":"dual-stack"},"readiness":{"grade":"A","summary":"Website, mail and DNS all work over IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"vpn.upenn.edu has an AAAA record and answers on it.","addresses":[{"address":"2607:f470:0:2:0:4:56:3","result":"answers","port":443}]},{"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":"6 of 8 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"dns1.udel.edu","ipv6":false},{"host":"dns2.udel.edu","ipv6":false},{"host":"adns1.nnn.upenn.edu","ipv6":true},{"host":"adns2.nnn.upenn.edu","ipv6":true},{"host":"adns3.nnn.upenn.edu","ipv6":true},{"host":"adns4.upenn.edu","ipv6":true},{"host":"adns5.upenn.edu","ipv6":true},{"host":"adns6.upenn.edu","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 403.","hops":[{"url":"https://vpn.upenn.edu/","address":"2607:f470:0:2:0:4:56:3","status":403,"tls":"valid"}]},"receiptId":"w0h3oI2rbT","reused":true,"measuredAt":"2026-11-03T06:02:34.461Z"}