{"kind":"host","input":"a1sys.dev","report":{"host":"a1sys.dev","checkedAt":"2026-10-31T07:48:43.552Z","a":{"status":"found","values":["104.21.78.233","172.67.138.105"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2606:4700:3034::ac43:8a69","2606:4700:3035::6815:4ee9"],"ttl":300,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.a1sys.dev","a":{"status":"found","values":["172.67.138.105","104.21.78.233"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2606:4700:3034::ac43:8a69","2606:4700:3035::6815:4ee9"],"ttl":300,"via":"Cloudflare","cname":[]},"verdict":"dual-stack"}},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: its mail servers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"a1sys.dev has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2606:4700:3034::ac43:8a69","result":"answers","port":443},{"address":"2606:4700:3035::6815:4ee9","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.a1sys.dev has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2606:4700:3034::ac43:8a69","result":"answers","port":443},{"address":"2606:4700:3035::6815:4ee9","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"None of the mail servers has an AAAA record.","hosts":[{"host":"mx.zoho.com","ipv6":false},{"host":"mx2.zoho.com","ipv6":false},{"host":"mx3.zoho.com","ipv6":false}]},{"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":"amber.ns.cloudflare.com","ipv6":true},{"host":"nile.ns.cloudflare.com","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.","hops":[{"url":"https://a1sys.dev/","address":"2606:4700:3034::ac43:8a69","status":301,"tls":"valid"},{"url":"https://a1gbr.com/","address":"2606:4700:3033::6815:5608","status":200,"tls":"valid"}]},"receiptId":"YKNhfhE0F8"}