{"domain":"166.com","result":true,"measuredAt":"2026-11-01T05:14:50.512Z","receiptId":"3sTp5-DIhs","answer":{"kind":"host","input":"166.com","report":{"host":"166.com","checkedAt":"2026-11-01T05:14:49.934Z","a":{"status":"found","values":["42.186.215.27"],"ttl":1800,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.166.com","a":{"status":"found","values":["42.186.215.27"],"ttl":1800,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only"}},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"166.com has no AAAA record."},{"key":"www","label":"www over IPv6","status":"fail","detail":"www.166.com 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":"ns5.166.com","ipv6":false},{"host":"ns2.166.com","ipv6":false},{"host":"ns6.166.com","ipv6":false},{"host":"ns8.166.com","ipv6":false},{"host":"ns4.166.com","ipv6":false},{"host":"ns1.166.com","ipv6":false},{"host":"ns3.166.com","ipv6":false}]}]}},"states":[{"firstSeen":"2026-11-01T05:14:50.512Z","lastConfirmed":"2026-11-01T05:14:50.512Z","checks":1,"verdict":"ipv4-only","grade":"D","web":"fail","www":"fail","mail":"fail","dns":"fail","secondLook":null}]}