{"kind":"host","input":"comcast.net","report":{"host":"comcast.net","checkedAt":"2026-10-30T22:03:33.873Z","a":{"status":"found","values":["96.99.240.167"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2001:558:feed:dc:96:99:240:167"],"ttl":300,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.comcast.net","a":{"status":"found","values":["104.86.166.187"],"ttl":20,"via":"Cloudflare","cname":["www.comcast.net.edgekey.net","e7010.dscg.akamaiedge.net"]},"aaaa":{"status":"found","values":["2600:1408:c400:f97::1b62","2600:1408:c400:f80::1b62"],"ttl":20,"via":"Cloudflare","cname":["www.comcast.net.edgekey.net","e7010.dscg.akamaiedge.net"]},"verdict":"dual-stack"}},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: its mail servers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"comcast.net has an AAAA record and answers on it.","addresses":[{"address":"2001:558:feed:dc:96:99:240:167","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.comcast.net has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2600:1408:c400:f97::1b62","result":"answers","port":443},{"address":"2600:1408:c400:f80::1b62","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":"mx1.mxge.comcast.net","ipv6":false},{"host":"mx2.mxge.comcast.net","ipv6":false},{"host":"mx1a1.comcast.net","ipv6":false},{"host":"mx1c1.comcast.net","ipv6":false},{"host":"mx1h1.comcast.net","ipv6":false},{"host":"mx2a1.comcast.net","ipv6":false},{"host":"mx2c1.comcast.net","ipv6":false},{"host":"mx2h1.comcast.net","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}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate after 2 redirects: HTTP 403.","hops":[{"url":"https://comcast.net/","address":"2001:558:feed:dc:96:99:240:167","status":302,"tls":"valid"},{"url":"https://www.comcast.net/","address":"2600:1408:c400:f97::1b62","status":301,"tls":"valid"},{"url":"https://www.xfinity.com/","address":"2600:1408:c400:1887::2af2","status":403,"tls":"valid"}]},"receiptId":"WRjl7HOR6E"}