{"kind":"host","input":"amazon.co.jp","report":{"host":"amazon.co.jp","checkedAt":"2026-10-31T02:53:30.644Z","a":{"status":"found","values":["18.246.98.187","18.246.99.104","18.246.95.183"],"ttl":524,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.amazon.co.jp","a":{"status":"found","values":["13.227.66.143"],"ttl":55,"via":"Cloudflare","cname":["tp.4d5ad1d2b-frontier.amazon.co.jp","cf.4d5ad1d2b-frontier.amazon.co.jp"]},"aaaa":{"status":"found","values":["2600:1408:c400:380::3bd0","2600:1408:c400:386::3bd0","2600:1408:c400:383::3bd0","2600:1408:c400:381::3bd0","2600:1408:c400:387::3bd0"],"ttl":20,"via":"Cloudflare","cname":["tp.4d5ad1d2b-frontier.amazon.co.jp","www.amazon.co.jp.edgekey.net","e15312.dsca.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":"amazon.co.jp has no AAAA record."},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.amazon.co.jp has 4 IPv6 addresses and answers on every one we tested (1 more not tested).","addresses":[{"address":"2600:1408:c400:380::3bd0","result":"answers","port":443},{"address":"2600:1408:c400:386::3bd0","result":"answers","port":443},{"address":"2600:1408:c400:383::3bd0","result":"answers","port":443},{"address":"2600:1408:c400:381::3bd0","result":"answers","port":443},{"address":"2600:1408:c400:387::3bd0","result":"not tested"}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"None of the mail servers has an AAAA record.","hosts":[{"host":"amazon-smtp.amazon.com","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns-1527.awsdns-62.org","ipv6":true},{"host":"ns-1736.awsdns-25.co.uk","ipv6":true},{"host":"ns-177.awsdns-22.com","ipv6":true},{"host":"ns-587.awsdns-09.net","ipv6":true}]}]},"receiptId":"WGytw2zOY3"}