{"kind":"host","input":"netsys-lab.org","report":{"host":"netsys-lab.org","checkedAt":"2026-11-10T14:43:25.131Z","a":{"status":"found","values":["172.67.200.133","104.21.68.249"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2606:4700:3037::6815:44f9","2606:4700:3033::ac43:c885"],"ttl":300,"via":"Cloudflare","cname":[]},"verdict":"dual-stack"},"readiness":{"grade":"A","summary":"Website, mail and DNS all work over IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"netsys-lab.org has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2606:4700:3037::6815:44f9","result":"answers","port":443},{"address":"2606:4700:3033::ac43:c885","result":"answers","port":443}]},{"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":"dara.ns.cloudflare.com","ipv6":true},{"host":"john.ns.cloudflare.com","ipv6":true}]}]},"https":{"status":"fail","problem":"redirect-no-ipv6","summary":"Redirects to github.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.","hops":[{"url":"https://netsys-lab.org/","address":"2606:4700:3037::6815:44f9","status":301,"tls":"valid"},{"url":"https://github.com/","note":"redirects to github.com, which has no IPv6 address"}]},"receiptId":"Too0T1dbQY","reused":true,"measuredAt":"2026-11-10T14:43:25.551Z"}