{"kind":"host","input":"fbcdn.net","report":{"host":"fbcdn.net","checkedAt":"2026-10-30T18:49:26.223Z","a":{"status":"found","values":["57.145.2.1"],"ttl":41,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2a03:2880:f373:1:face:b00c:0:25de"],"ttl":60,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.fbcdn.net","a":{"status":"found","values":["57.145.2.1"],"ttl":60,"via":"Cloudflare","cname":["www.facebook.com","star-mini.c10r.facebook.com"]},"aaaa":{"status":"found","values":["2a03:2880:f373:1:face:b00c:0:25de"],"ttl":60,"via":"Cloudflare","cname":["www.facebook.com","star-mini.c10r.facebook.com"]},"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":"fbcdn.net has an AAAA record and answers on it.","addresses":[{"address":"2a03:2880:f373:1:face:b00c:0:25de","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.fbcdn.net has an AAAA record and answers on it.","addresses":[{"address":"2a03:2880:f373:1:face:b00c:0:25de","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":"4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"d.ns.facebook.com","ipv6":true},{"host":"c.ns.facebook.com","ipv6":true},{"host":"b.ns.facebook.com","ipv6":true},{"host":"a.ns.facebook.com","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.","hops":[{"url":"https://fbcdn.net/","address":"2a03:2880:f373:1:face:b00c:0:25de","status":302,"tls":"valid"},{"url":"https://www.facebook.com/","address":"2a03:2880:f381:1:face:b00c:0:25de","status":200,"tls":"valid"}]},"receiptId":"CV4qaw6UZ9"}