{"kind":"host","input":"www.gov.uk","report":{"host":"www.gov.uk","checkedAt":"2026-10-31T10:27:23.811Z","a":{"status":"found","values":["151.101.192.144","151.101.0.144","151.101.64.144","151.101.128.144"],"ttl":34,"via":"Cloudflare","cname":["www-cdn.production.govuk.service.gov.uk","www-gov-uk.map.fastly.net"]},"aaaa":{"status":"found","values":["2a04:4e42::144","2a04:4e42:200::144","2a04:4e42:400::144","2a04:4e42:600::144"],"ttl":44,"via":"Cloudflare","cname":["www-cdn.production.govuk.service.gov.uk","www-gov-uk.map.fastly.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":"www.gov.uk has 4 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2a04:4e42::144","result":"answers","port":443},{"address":"2a04:4e42:200::144","result":"answers","port":443},{"address":"2a04:4e42:400::144","result":"answers","port":443},{"address":"2a04:4e42:600::144","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":"8 of 8 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"nsa.nic.uk","ipv6":true},{"host":"nsb.nic.uk","ipv6":true},{"host":"nsc.nic.uk","ipv6":true},{"host":"nsd.nic.uk","ipv6":true},{"host":"dns1.nic.uk","ipv6":true},{"host":"dns2.nic.uk","ipv6":true},{"host":"dns3.nic.uk","ipv6":true},{"host":"dns4.nic.uk","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 200.","hops":[{"url":"https://www.gov.uk/","address":"2a04:4e42::144","status":200,"tls":"valid"}]},"receiptId":"GZMN6S0yHa"}