{"kind":"host","input":"api.census.gov","report":{"host":"api.census.gov","checkedAt":"2026-11-01T23:47:42.600Z","a":{"status":"found","values":["148.129.75.191"],"ttl":60,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2610:20:2010:a05:1000:0:9481:4bbf"],"ttl":60,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.api.census.gov","a":{"status":"absent","via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"no-address"}},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: www doesn't fully work over IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"api.census.gov has an AAAA record and answers on it.","addresses":[{"address":"2610:20:2010:a05:1000:0:9481:4bbf","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"fail","detail":"www.api.census.gov has no AAAA record."},{"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":"3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"gold.foundationdns.com","ipv6":true},{"host":"gold.foundationdns.net","ipv6":true},{"host":"gold.foundationdns.org","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.","hops":[{"url":"https://api.census.gov/","address":"2610:20:2010:a05:1000:0:9481:4bbf","status":302,"tls":"valid"},{"url":"https://www.census.gov/data/developers.html","address":"2606:4700:78::90:0:183","status":200,"tls":"valid"}]},"receiptId":"VKSklCQSuk","reused":true,"measuredAt":"2026-11-01T23:47:42.715Z"}