{"kind":"host","input":"tailscale.com","report":{"host":"tailscale.com","checkedAt":"2026-10-31T20:31:30.819Z","a":{"status":"found","values":["76.76.21.21"],"ttl":60,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2600:9000:a51d:27c1:6748:d035:a989:fb3c","2600:9000:a602:b1e6:5b89:50a1:7cf7:67b8"],"ttl":149,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.tailscale.com","a":{"status":"found","values":["76.76.21.21"],"ttl":60,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2600:9000:a51d:27c1:6748:d035:a989:fb3c","2600:9000:a602:b1e6:5b89:50a1:7cf7:67b8"],"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":"tailscale.com has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2600:9000:a51d:27c1:6748:d035:a989:fb3c","result":"answers","port":443},{"address":"2600:9000:a602:b1e6:5b89:50a1:7cf7:67b8","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.tailscale.com has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2600:9000:a51d:27c1:6748:d035:a989:fb3c","result":"answers","port":443},{"address":"2600:9000:a602:b1e6:5b89:50a1:7cf7:67b8","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"aspmx.l.google.com","ipv6":true},{"host":"alt3.aspmx.l.google.com","ipv6":true},{"host":"alt4.aspmx.l.google.com","ipv6":true},{"host":"alt1.aspmx.l.google.com","ipv6":true},{"host":"alt2.aspmx.l.google.com","ipv6":true}]},{"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-1359.awsdns-41.org","ipv6":true},{"host":"ns-1558.awsdns-02.co.uk","ipv6":true},{"host":"ns-197.awsdns-24.com","ipv6":true},{"host":"ns-557.awsdns-05.net","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 200.","hops":[{"url":"https://tailscale.com/","address":"2600:9000:a51d:27c1:6748:d035:a989:fb3c","status":200,"tls":"valid"}]},"receiptId":"cirKrr_qYw"}