{"kind":"host","input":"medlineplus.gov","report":{"host":"medlineplus.gov","checkedAt":"2026-11-08T16:57:09.713Z","a":{"status":"found","values":["3.170.3.7","3.170.3.117","3.170.3.51","3.170.3.114"],"ttl":60,"via":"Cloudflare","cname":["medlineplus.awsprod.nlm.nih.gov"]},"aaaa":{"status":"found","values":["2600:9000:286a:a600:1:6b7c:7400:93a1","2600:9000:286a:6a00:1:6b7c:7400:93a1","2600:9000:286a:1000:1:6b7c:7400:93a1","2600:9000:286a:e600:1:6b7c:7400:93a1","2600:9000:286a:e000:1:6b7c:7400:93a1","2600:9000:286a:1e00:1:6b7c:7400:93a1","2600:9000:286a:5000:1:6b7c:7400:93a1","2600:9000:286a:c800:1:6b7c:7400:93a1"],"ttl":15,"via":"Cloudflare","cname":["medlineplus.awsprod.nlm.nih.gov"]},"verdict":"dual-stack","www":{"host":"www.medlineplus.gov","a":{"status":"found","values":["3.170.3.51","3.170.3.114","3.170.3.117","3.170.3.7"],"ttl":52,"via":"Cloudflare","cname":["medlineplus.awsprod.nlm.nih.gov"]},"aaaa":{"status":"found","values":["2600:9000:286a:c00:1:6b7c:7400:93a1","2600:9000:286a:4400:1:6b7c:7400:93a1","2600:9000:286a:ee00:1:6b7c:7400:93a1","2600:9000:286a:fc00:1:6b7c:7400:93a1","2600:9000:286a:3400:1:6b7c:7400:93a1","2600:9000:286a:c400:1:6b7c:7400:93a1","2600:9000:286a:a600:1:6b7c:7400:93a1","2600:9000:286a:2000:1:6b7c:7400:93a1"],"ttl":60,"via":"Cloudflare","cname":["medlineplus.awsprod.nlm.nih.gov"]},"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":"medlineplus.gov has 4 IPv6 addresses and answers on every one we tested (4 more not tested).","addresses":[{"address":"2600:9000:286a:a600:1:6b7c:7400:93a1","result":"answers","port":443},{"address":"2600:9000:286a:6a00:1:6b7c:7400:93a1","result":"answers","port":443},{"address":"2600:9000:286a:1000:1:6b7c:7400:93a1","result":"answers","port":443},{"address":"2600:9000:286a:e600:1:6b7c:7400:93a1","result":"answers","port":443},{"address":"2600:9000:286a:e000:1:6b7c:7400:93a1","result":"not tested"},{"address":"2600:9000:286a:1e00:1:6b7c:7400:93a1","result":"not tested"},{"address":"2600:9000:286a:5000:1:6b7c:7400:93a1","result":"not tested"},{"address":"2600:9000:286a:c800:1:6b7c:7400:93a1","result":"not tested"}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.medlineplus.gov has 4 IPv6 addresses and answers on every one we tested (4 more not tested).","addresses":[{"address":"2600:9000:286a:c00:1:6b7c:7400:93a1","result":"answers","port":443},{"address":"2600:9000:286a:4400:1:6b7c:7400:93a1","result":"answers","port":443},{"address":"2600:9000:286a:ee00:1:6b7c:7400:93a1","result":"answers","port":443},{"address":"2600:9000:286a:fc00:1:6b7c:7400:93a1","result":"answers","port":443},{"address":"2600:9000:286a:3400:1:6b7c:7400:93a1","result":"not tested"},{"address":"2600:9000:286a:c400:1:6b7c:7400:93a1","result":"not tested"},{"address":"2600:9000:286a:a600:1:6b7c:7400:93a1","result":"not tested"},{"address":"2600:9000:286a:2000:1:6b7c:7400:93a1","result":"not tested"}]},{"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}]},{"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":"gslb01.nlm.nih.gov","ipv6":true},{"host":"gslb02.nlm.nih.gov","ipv6":true},{"host":"gslb03.nlm.nih.gov","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 200.","hops":[{"url":"https://medlineplus.gov/","address":"2600:9000:286a:a600:1:6b7c:7400:93a1","status":200,"tls":"valid"}]},"receiptId":"nzc-XyWEhA","reused":true,"measuredAt":"2026-11-08T16:57:09.748Z"}