{"kind":"host","input":"preview.weather.gov","report":{"host":"preview.weather.gov","checkedAt":"2026-11-02T18:16:14.092Z","a":{"status":"found","values":["23.204.115.7","23.204.115.15"],"ttl":20,"via":"Cloudflare","cname":["sancert.weather.gov.edgekey.net","e353369.dscg.akamaiedge.net"]},"aaaa":{"status":"found","values":["2600:1408:ec00:f::1730:cb2a","2600:1408:ec00:f::1730:cb33","2600:1408:ec00:f::1730:cb32"],"ttl":20,"via":"Cloudflare","cname":["sancert.weather.gov.edgekey.net","e353369.dscg.akamaiedge.net"]},"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":"preview.weather.gov has 3 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2600:1408:ec00:f::1730:cb2a","result":"answers","port":443},{"address":"2600:1408:ec00:f::1730:cb33","result":"answers","port":443},{"address":"2600:1408:ec00:f::1730:cb32","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":"a1-97.akam.net","ipv6":true},{"host":"a6-65.akam.net","ipv6":true},{"host":"a7-66.akam.net","ipv6":true},{"host":"a11-66.akam.net","ipv6":true},{"host":"a18-67.akam.net","ipv6":true},{"host":"a26-64.akam.net","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 200.","hops":[{"url":"https://preview.weather.gov/","address":"2600:1408:ec00:f::1730:cb2a","status":200,"tls":"valid"}]},"receiptId":"uVKIk3camT","reused":true,"measuredAt":"2026-11-02T18:16:14.254Z"}