{"kind":"host","input":"visualstudio.com","report":{"host":"visualstudio.com","checkedAt":"2026-10-31T12:08:18.737Z","a":{"status":"found","values":["150.171.73.16","150.171.74.16"],"ttl":506,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2603:1061:10:1::16","2603:1061:10::16"],"ttl":3171,"via":"Cloudflare","cname":[]},"verdict":"dual-stack","www":{"host":"www.visualstudio.com","a":{"status":"found","values":["104.71.255.104"],"ttl":20,"via":"Cloudflare","cname":["wildcard.visualstudio.com.edgekey.net","e19210.g.akamaiedge.net"]},"aaaa":{"status":"absent","via":"Cloudflare","cname":["wildcard.visualstudio.com.edgekey.net","e19210.g.akamaiedge.net"]},"verdict":"ipv4-only"}},"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":"visualstudio.com has 2 IPv6 addresses and answers on every one we tested.","addresses":[{"address":"2603:1061:10:1::16","result":"answers","port":443},{"address":"2603:1061:10::16","result":"answers","port":443}]},{"key":"www","label":"www over IPv6","status":"fail","detail":"www.visualstudio.com 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":"4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns1-07.azure-dns.com","ipv6":true},{"host":"ns2-07.azure-dns.net","ipv6":true},{"host":"ns3-07.azure-dns.org","ipv6":true},{"host":"ns4-07.azure-dns.info","ipv6":true}]}]},"https":{"status":"fail","problem":"redirect-no-ipv6","summary":"Redirects to www.visualstudio.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.","hops":[{"url":"https://visualstudio.com/","address":"2603:1061:10:1::16","status":308,"tls":"valid"},{"url":"https://www.visualstudio.com/","note":"redirects to www.visualstudio.com, which has no IPv6 address"}]},"receiptId":"ZEP3HMCt8b"}