{"kind":"host","input":"cloud.uchicago.edu","report":{"host":"cloud.uchicago.edu","checkedAt":"2026-11-01T00:34:53.723Z","a":{"status":"found","values":["150.171.109.118"],"ttl":10,"via":"Cloudflare","cname":["cloudservices.its.uchicago.edu","hubba882888a582-prod-frontdoor-endpoint-gkbrerhnepdbhbag.a01.azurefd.net","mr-a01.tm-azurefd.net"]},"aaaa":{"status":"found","values":["2603:1061:14:70::1"],"ttl":10,"via":"Cloudflare","cname":["cloudservices.its.uchicago.edu","hubba882888a582-prod-frontdoor-endpoint-gkbrerhnepdbhbag.a01.azurefd.net","mr-a01.tm-azurefd.net"]},"verdict":"dual-stack"},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: its nameservers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"cloud.uchicago.edu has an AAAA record and answers on it.","addresses":[{"address":"2603:1061:14:70::1","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":"fail","detail":"No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.","hosts":[{"host":"ucns1.uchicago.yale.edu","ipv6":false},{"host":"ucns1.uchicago.uiowa.edu","ipv6":false},{"host":"ucns3.uchicago.edu","ipv6":false},{"host":"ucns4.uchicago.edu","ipv6":false}]}]},"https":{"status":"fail","problem":"certificate","summary":"The certificate served over IPv6 at 2603:1061:14:70::1 isn't valid for cloud.uchicago.edu: ERR_TLS_CERT_ALTNAME_INVALID.","hops":[{"url":"https://cloud.uchicago.edu/","address":"2603:1061:14:70::1","tls":"ERR_TLS_CERT_ALTNAME_INVALID"}]},"receiptId":"CfPEN1wD5u","reused":true,"measuredAt":"2026-11-01T00:34:53.858Z"}