{"kind":"host","input":"webmail.uchicago.edu","report":{"host":"webmail.uchicago.edu","checkedAt":"2026-11-01T01:38:33.205Z","a":{"status":"found","values":["172.253.122.121"],"ttl":300,"via":"Cloudflare","cname":["ghs.googlehosted.com"]},"aaaa":{"status":"found","values":["2607:f8b0:4004:c23::79"],"ttl":300,"via":"Cloudflare","cname":["ghs.googlehosted.com"]},"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":"webmail.uchicago.edu has an AAAA record and answers on it.","addresses":[{"address":"2607:f8b0:4004:c23::79","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":"unknown","summary":"webmail.uchicago.edu didn't complete an HTTPS request over IPv6 (connection closed before a response).","hops":[{"url":"https://webmail.uchicago.edu/","address":"2607:f8b0:4004:c23::79","note":"connection closed before a response"}]},"receiptId":"GNeWWag8Zn","reused":true,"measuredAt":"2026-11-01T01:38:33.294Z"}