{"kind":"host","input":"email.uchicago.edu","report":{"host":"email.uchicago.edu","checkedAt":"2026-11-01T06:29:25.678Z","a":{"status":"found","values":["52.6.8.229","54.80.25.233","107.23.73.105"],"ttl":60,"via":"Cloudflare","cname":["redirect.uchicago.edu","redirect2.elb.uchicago.edu"]},"aaaa":{"status":"absent","via":"Cloudflare","cname":["redirect.uchicago.edu","redirect2.elb.uchicago.edu"]},"verdict":"ipv4-only"},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"email.uchicago.edu has no AAAA record."},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"No MX records, so mail goes to the domain's own address (implicit MX). It has no 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}]}]},"receiptId":"zy-SUUSUE8","reused":true,"measuredAt":"2026-11-01T06:29:25.771Z"}