{"kind":"host","input":"sina.com.cn","report":{"host":"sina.com.cn","checkedAt":"2026-10-31T13:39:37.010Z","a":{"status":"found","values":["36.51.254.91"],"ttl":60,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.sina.com.cn","a":{"status":"found","values":["155.102.176.83","155.102.176.87","155.102.176.86","155.102.176.81","155.102.176.82","155.102.176.84","155.102.176.88","155.102.176.85"],"ttl":33,"via":"Cloudflare","cname":["spool.grid.sinaedge.com","ww1.sinaimg.cn.w.alikunlun.com"]},"aaaa":{"status":"found","values":["2404:2280:205:0:3::59","2404:2280:205:0:3::58"],"ttl":60,"via":"Cloudflare","cname":["spool.grid.sinaedge.com","ww1.sinaimg.cn.w.alikunlun.com"]},"verdict":"dual-stack"}},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"sina.com.cn has no AAAA record."},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.sina.com.cn has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2404:2280:205:0:3::59","result":"answers","port":443},{"address":"2404:2280:205:0:3::58","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":"freemx2.sinamail.sina.com.cn","ipv6":false},{"host":"freemx1.sinamail.sina.com.cn","ipv6":false},{"host":"freemx3.sinamail.sina.com.cn","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":"ns1.sina.com.cn","ipv6":false},{"host":"ns3.sina.com.cn","ipv6":false},{"host":"ns2.sina.com.cn","ipv6":false},{"host":"ns4.sina.com.cn","ipv6":false}]}]},"receiptId":"gxjiHwDFvF"}