{"kind":"host","input":"api.si.edu","report":{"host":"api.si.edu","checkedAt":"2026-11-01T01:59:05.843Z","a":{"status":"found","values":["56.137.180.131","52.61.34.108"],"ttl":60,"via":"Cloudflare","cname":["api-si-edu.domains.api.data.gov","api.si.edu.external-domains-production.cloud.gov"]},"aaaa":{"status":"found","values":["2600:1f12:18a:7d01:b3fb:4329:2d20:18db","2600:1f12:18a:7d00:6bcf:d9f7:9330:a1a2"],"ttl":60,"via":"Cloudflare","cname":["api-si-edu.domains.api.data.gov","api.si.edu.external-domains-production.cloud.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":"api.si.edu has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2600:1f12:18a:7d01:b3fb:4329:2d20:18db","result":"answers","port":443},{"address":"2600:1f12:18a:7d00:6bcf:d9f7:9330:a1a2","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":"6 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"a1-88.akam.net","ipv6":true},{"host":"a9-64.akam.net","ipv6":true},{"host":"a11-67.akam.net","ipv6":true},{"host":"a24-67.akam.net","ipv6":true},{"host":"a26-66.akam.net","ipv6":true},{"host":"a28-65.akam.net","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 404.","hops":[{"url":"https://api.si.edu/","address":"2600:1f12:18a:7d01:b3fb:4329:2d20:18db","status":404,"tls":"valid"}]},"receiptId":"jTra8icCPO","reused":true,"measuredAt":"2026-11-01T01:59:06.179Z"}