{"kind":"host","input":"facebookf.net","report":{"host":"facebookf.net","checkedAt":"2026-11-03T18:31:54.998Z","a":{"status":"found","values":["96.126.111.165","45.79.167.180","66.175.209.179","45.33.83.100"],"ttl":600,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2600:3c03::f03c:95ff:feed:4d4f","2600:3c03::f03c:95ff:fe00:29ca","2600:3c03::f03c:95ff:feed:cf2a","2600:3c03::f03c:95ff:fe91:5d52"],"ttl":600,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.facebookf.net","a":{"status":"found","values":["66.175.209.179","45.79.167.180","96.126.111.165","45.33.83.100"],"ttl":600,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2600:3c03::f03c:95ff:fe91:5d52","2600:3c03::f03c:95ff:feed:cf2a","2600:3c03::f03c:95ff:feed:4d4f","2600:3c03::f03c:95ff:fe00:29ca"],"ttl":600,"via":"Cloudflare","cname":[]},"verdict":"dual-stack"}},"readiness":{"grade":"C","summary":"Works over IPv6, with gaps: its mail servers lack IPv6; its nameservers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"facebookf.net has 4 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2600:3c03::f03c:95ff:feed:4d4f","result":"answers","port":443},{"address":"2600:3c03::f03c:95ff:fe00:29ca","result":"answers","port":443},{"address":"2600:3c03::f03c:95ff:feed:cf2a","result":"answers","port":443},{"address":"2600:3c03::f03c:95ff:fe91:5d52","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.facebookf.net has 4 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2600:3c03::f03c:95ff:fe91:5d52","result":"answers","port":443},{"address":"2600:3c03::f03c:95ff:feed:cf2a","result":"answers","port":443},{"address":"2600:3c03::f03c:95ff:feed:4d4f","result":"answers","port":443},{"address":"2600:3c03::f03c:95ff:fe00:29ca","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":"mx195.m1bp.com","ipv6":false},{"host":"mx195.mb5p.com","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"fail","detail":"No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.","hosts":[{"host":"chichi.ns.giantpanda.com","ipv6":false},{"host":"meilun.ns.giantpanda.com","ipv6":false}]}]},"https":{"status":"fail","problem":"certificate","summary":"The certificate served over IPv6 at 2600:3c03::f03c:95ff:feed:4d4f isn't valid for facebookf.net: UNABLE_TO_GET_ISSUER_CERT_LOCALLY.","hops":[{"url":"https://facebookf.net/","address":"2600:3c03::f03c:95ff:feed:4d4f","tls":"UNABLE_TO_GET_ISSUER_CERT_LOCALLY"}]},"receiptId":"IeVZECNia8","reused":true,"measuredAt":"2026-11-03T18:31:55.053Z"}