{"kind":"host","input":"dev.british-history.ac.uk","report":{"host":"dev.british-history.ac.uk","checkedAt":"2026-11-15T18:32:21.310Z","a":{"status":"found","values":["150.171.109.73"],"ttl":10,"via":"Cloudflare","cname":["bho-prod-akg8dgazbmdganh7.z01.azurefd.net","mr-z01.tm-azurefd.net"]},"aaaa":{"status":"found","values":["2603:1061:14:48::1"],"ttl":10,"via":"Cloudflare","cname":["bho-prod-akg8dgazbmdganh7.z01.azurefd.net","mr-z01.tm-azurefd.net"]},"verdict":"dual-stack"},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: its nameservers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"dev.british-history.ac.uk has an AAAA record and answers on it.","addresses":[{"address":"2603:1061:14:48::1","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":"fail","detail":"No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.","hosts":[{"host":"ns0.ulcc.ac.uk","ipv6":false},{"host":"ns1.ulcc.ac.uk","ipv6":false}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate: HTTP 403.","hops":[{"url":"https://dev.british-history.ac.uk/","address":"2603:1061:14:48::1","status":403,"tls":"valid"}]},"receiptId":"alrDQA3trb","reused":true,"measuredAt":"2026-11-15T18:32:21.733Z"}