{"kind":"host","input":"oreilly.com","report":{"host":"oreilly.com","checkedAt":"2026-11-01T06:24:26.219Z","a":{"status":"found","values":["34.169.83.167"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.oreilly.com","a":{"status":"found","values":["104.71.249.90"],"ttl":20,"via":"Cloudflare","cname":["www.oreilly.com.edgekey.net","e4619.dscg.akamaiedge.net"]},"aaaa":{"status":"found","values":["2600:1408:c400:189::120b","2600:1408:c400:18e::120b"],"ttl":20,"via":"Cloudflare","cname":["www.oreilly.com.edgekey.net","e4619.dscg.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":"oreilly.com has no AAAA record."},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.oreilly.com has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2600:1408:c400:189::120b","result":"answers","port":443},{"address":"2600:1408:c400:18e::120b","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"aspmx2.googlemail.com","ipv6":true},{"host":"alt1.aspmx.l.google.com","ipv6":true},{"host":"alt2.aspmx.l.google.com","ipv6":true},{"host":"aspmx.l.google.com","ipv6":true},{"host":"aspmx3.googlemail.com","ipv6":true}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"6 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"a13-64.akam.net","ipv6":true},{"host":"a4-64.akam.net","ipv6":true},{"host":"a3-67.akam.net","ipv6":true},{"host":"a1-225.akam.net","ipv6":true},{"host":"a16-65.akam.net","ipv6":true},{"host":"a20-66.akam.net","ipv6":true}]}]},"receiptId":"vc0NG44d_Y","reused":true,"measuredAt":"2026-11-01T06:24:26.489Z"}