{"kind":"host","input":"docs.posthog.com","report":{"host":"docs.posthog.com","checkedAt":"2026-11-01T23:03:02.510Z","a":{"status":"found","values":["104.20.17.167","172.66.166.164"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2606:4700:10::6814:11a7","2606:4700:10::ac42:a6a4"],"ttl":300,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.docs.posthog.com","a":{"status":"absent","via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"no-address"}},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: www doesn't fully work over IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"docs.posthog.com has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2606:4700:10::6814:11a7","result":"answers","port":443},{"address":"2606:4700:10::ac42:a6a4","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"fail","detail":"www.docs.posthog.com has no AAAA record."},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record."},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"rory.ns.cloudflare.com","ipv6":true},{"host":"julissa.ns.cloudflare.com","ipv6":true}]}]},"https":{"status":"fail","problem":"redirect-no-ipv6","summary":"Redirects to posthog.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.","hops":[{"url":"https://docs.posthog.com/","address":"2606:4700:10::6814:11a7","status":301,"tls":"valid"},{"url":"https://posthog.com/docs","note":"redirects to posthog.com, which has no IPv6 address"}]},"receiptId":"pZL4KF_joI","reused":true,"measuredAt":"2026-11-01T23:03:02.566Z"}