{"kind":"host","input":"mail.census.gov","report":{"host":"mail.census.gov","checkedAt":"2026-11-01T20:12:52.768Z","a":{"status":"found","values":["148.129.75.15","148.129.129.15"],"ttl":900,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2610:20:2000:101::f:0","2610:20:2010:a04::f:0"],"ttl":900,"via":"Cloudflare","cname":[]},"verdict":"dual-stack"},"readiness":{"grade":"F","summary":"Publishes IPv6 but doesn't answer on it — worse than having none.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"broken","detail":"mail.census.gov has an AAAA record, but nothing answered on ports 443 or 80. IPv6 visitors wait for a timeout before falling back to IPv4.","addresses":[{"address":"2610:20:2000:101::f:0","result":"no answer"},{"address":"2610:20:2010:a04::f:0","result":"no answer"}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"mail1.census.gov","ipv6":true},{"host":"mail2.census.gov","ipv6":true}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns1e.census.gov","ipv6":true},{"host":"ns2e.census.gov","ipv6":true}]}]},"receiptId":"ZsWOHZ5A9S","reused":true,"measuredAt":"2026-11-01T20:12:58.772Z"}