{"kind":"host","input":"gridlabs.courses","report":{"host":"gridlabs.courses","checkedAt":"2026-11-13T18:19:05.216Z","a":{"status":"found","values":["172.67.129.69","104.21.2.136"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2606:4700:3037::ac43:8145","2606:4700:3030::6815:288"],"ttl":300,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.gridlabs.courses","a":{"status":"found","values":["172.67.129.69","104.21.2.136"],"ttl":300,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2606:4700:3030::6815:288","2606:4700:3037::ac43:8145"],"ttl":300,"via":"Cloudflare","cname":[]},"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":"gridlabs.courses has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2606:4700:3037::ac43:8145","result":"answers","port":443},{"address":"2606:4700:3030::6815:288","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"pass","detail":"www.gridlabs.courses has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2606:4700:3030::6815:288","result":"answers","port":443},{"address":"2606:4700:3037::ac43:8145","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"Every mail server has an AAAA record.","hosts":[{"host":"gridlabs-courses.mail.protection.outlook.com","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":"dolly.ns.cloudflare.com","ipv6":true},{"host":"josh.ns.cloudflare.com","ipv6":true}]}]},"https":{"status":"fail","problem":"redirect-no-ipv6","summary":"Redirects to argorant.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.","hops":[{"url":"https://gridlabs.courses/","address":"2606:4700:3037::ac43:8145","status":301,"tls":"valid"},{"url":"https://argorant.com/","note":"redirects to argorant.com, which has no IPv6 address"}]},"receiptId":"PWD9ZZ4JYM","reused":true,"measuredAt":"2026-11-13T18:19:05.394Z"}