{"kind":"host","input":"uchicago.edu","report":{"host":"uchicago.edu","checkedAt":"2026-10-31T21:46:50.370Z","a":{"status":"found","values":["3.215.148.80"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.uchicago.edu","a":{"status":"found","values":["150.171.109.74"],"ttl":10,"via":"Cloudflare","cname":["hubba882888a582-prod-frontdoor-endpoint-gkbrerhnepdbhbag.a01.azurefd.net","mr-a01.tm-azurefd.net"]},"aaaa":{"status":"found","values":["2603:1061:14:49::1"],"ttl":10,"via":"Cloudflare","cname":["hubba882888a582-prod-frontdoor-endpoint-gkbrerhnepdbhbag.a01.azurefd.net","mr-a01.tm-azurefd.net"]},"verdict":"dual-stack"}},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"uchicago.edu has no AAAA record."},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.uchicago.edu has an AAAA record and answers on it.","addresses":[{"address":"2603:1061:14:49::1","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":"mxa-002fc702.gslb.pphosted.com","ipv6":false},{"host":"mxb-002fc702.gslb.pphosted.com","ipv6":false},{"host":"mx0a-002fc702.pphosted.com","ipv6":false},{"host":"mx0b-002fc702.pphosted.com","ipv6":false}]},{"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":"V47_IcSC2g","reused":true,"measuredAt":"2026-10-31T21:46:50.469Z"}