{"kind":"host","input":"nih.gov","report":{"host":"nih.gov","checkedAt":"2026-10-30T23:34:35.293Z","a":{"status":"found","values":["156.40.212.210"],"ttl":1370,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only","www":{"host":"www.nih.gov","a":{"status":"found","values":["172.65.90.24","172.65.90.25","172.65.90.26","172.65.90.27"],"ttl":300,"via":"Cloudflare","cname":["www.nih.gov.cdn.cloudflare.net"]},"aaaa":{"status":"found","values":["2606:4700:78::90:0:183","2606:4700:78::90:0:180","2606:4700:78::90:0:181","2606:4700:78::90:0:182"],"ttl":156,"via":"Cloudflare","cname":["www.nih.gov.cdn.cloudflare.net"]},"verdict":"dual-stack"}},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"nih.gov has no AAAA record."},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.nih.gov has 4 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2606:4700:78::90:0:183","result":"answers","port":443},{"address":"2606:4700:78::90:0:180","result":"answers","port":443},{"address":"2606:4700:78::90:0:181","result":"answers","port":443},{"address":"2606:4700:78::90:0:182","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"nihcesxway3.hub.nih.gov","ipv6":true},{"host":"nihcesxway4.hub.nih.gov","ipv6":true},{"host":"nihcesxway5.hub.nih.gov","ipv6":true},{"host":"nihcesxway6.hub.nih.gov","ipv6":true},{"host":"nihcesxwayst03.hub.nih.gov","ipv6":true},{"host":"nihcesxwayst04.hub.nih.gov","ipv6":true},{"host":"nihcesxwayst05.hub.nih.gov","ipv6":true},{"host":"nihcesxwayst06.hub.nih.gov","ipv6":true}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns.nih.gov","ipv6":true},{"host":"ns2.nih.gov","ipv6":true},{"host":"ns3.nih.gov","ipv6":true}]}]},"receiptId":"F4mX6LZAOx"}