{"kind":"host","input":"calendar.colorado.edu","report":{"host":"calendar.colorado.edu","checkedAt":"2026-11-03T07:03:13.151Z","a":{"status":"found","values":["150.171.109.118"],"ttl":10,"via":"Cloudflare","cname":["ucboulder.enterprise.localist.com","enterprise-web.localist.com","localist-production-ftgjadhqgwdqhbfp.z03.azurefd.net","mr-z03.tm-azurefd.net"]},"aaaa":{"status":"found","values":["2603:1061:14:47::1"],"ttl":10,"via":"Cloudflare","cname":["ucboulder.enterprise.localist.com","enterprise-web.localist.com","localist-production-ftgjadhqgwdqhbfp.z03.azurefd.net","mr-z03.tm-azurefd.net"]},"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":"calendar.colorado.edu has an AAAA record and answers on it.","addresses":[{"address":"2603:1061:14:47::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":"pass","detail":"6 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"a2-67.akam.net","ipv6":true},{"host":"a20-65.akam.net","ipv6":true},{"host":"a1-153.akam.net","ipv6":true},{"host":"a3-66.akam.net","ipv6":true},{"host":"a22-67.akam.net","ipv6":true},{"host":"a11-66.akam.net","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 200.","hops":[{"url":"https://calendar.colorado.edu/","address":"2603:1061:14:47::1","status":200,"tls":"valid"}]},"receiptId":"7UumU3e3kH","reused":true,"measuredAt":"2026-11-03T07:03:13.283Z"}