{"kind":"host","input":"comcast.com","report":{"host":"comcast.com","checkedAt":"2026-10-31T22:30:08.829Z","a":{"status":"found","values":["96.99.227.0"],"ttl":96,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.comcast.com","a":{"status":"found","values":["104.81.161.16"],"ttl":20,"via":"Cloudflare","cname":["www.comcast.com.edgekey.net","e523.dscb.akamaiedge.net"]},"aaaa":{"status":"found","values":["2600:1408:c400:78e::20b","2600:1408:c400:791::20b"],"ttl":20,"via":"Cloudflare","cname":["www.comcast.com.edgekey.net","e523.dscb.akamaiedge.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":"comcast.com has no AAAA record."},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.comcast.com has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2600:1408:c400:78e::20b","result":"answers","port":443},{"address":"2600:1408:c400:791::20b","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-00143702.gslb.pphosted.com","ipv6":false},{"host":"mxb-00143702.gslb.pphosted.com","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"5 of 5 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"dns101.comcast.net","ipv6":true},{"host":"dns102.comcast.net","ipv6":true},{"host":"dns103.comcast.net","ipv6":true},{"host":"dns104.comcast.net","ipv6":true},{"host":"dns105.comcast.net","ipv6":true}]}]},"receiptId":"7rRM_2MCpg","reused":true,"measuredAt":"2026-10-31T22:30:08.915Z"}