Check whether a domain has an IPv6 address, and what it is
Runs in your browser. Only the lookup you start is sent to cloudflare-dns.com or dns.google; nothing else leaves your device. Updated on 25 Oct 2026.An AAAA record is the IPv6 address of a name, the counterpart of the A record for IPv4. Type a domain to see whether it can be reached over IPv6 and at which addresses, each with its TTL. Many sites still have none. A name that is an alias shows the CNAME it went through first, so you can tell whether the IPv6 address belongs to you or to your CDN.
Leave Record type on AAAA, which the page selects for you.
Type the domain, such as google.com, and press Look up.
Read the IPv6 addresses in the Data column; No records means the domain has no IPv6 address.
Check the Alias chain line above the table to see whether the address belongs to a CDN.
This DNS lookup asks a public resolver, Cloudflare 1.1.1.1 or Google 8.8.8.8, the same question dig or nslookup would, and shows the answer in a table. Pick one record type, or "All common types" to ask for A, AAAA, CNAME, MX, NS, TXT, SOA, CAA and HTTPS together. Every record shows its TTL in seconds and in words, because the TTL is how long any copy of it may be cached.
A browser cannot send DNS packets itself, so the page uses DNS over HTTPS. The name you type goes to the resolver you chose, which is how it gets an answer; nothing else about you or your other searches is sent. You see what that resolver has in its cache, which can lag a recent change by up to the record's TTL. To compare two resolvers side by side, use the DNS Propagation Checker.
The tool does not do zone transfers, query a domain's own name servers directly, or show records at names you do not type: DNS has no way to list every subdomain.
The rest of the article, and all 6 questions about DNS Lookup, are on the DNS Lookup page.
Only the name and the record type, sent from your browser to the resolver you chose: Cloudflare at cloudflare-dns.com or Google at dns.google. The resolver needs them to answer. Nothing else leaves your device, and this site never sees the names you type.
A resolver that already cached the old answer keeps it until its TTL runs out, then asks again. A name that did not exist is remembered as missing for the SOA record's last number of seconds. Wait that long, or compare both resolvers in the DNS Propagation Checker.
NXDOMAIN is the DNS answer for a name that does not exist at all, for any record type. Common causes are a typo, a subdomain that was never created, or a domain that has expired. A name that exists but lacks the type asked for gets a different answer: no records.
SERVFAIL means the resolver tried and could not get a trustworthy answer. Either the domain's own name servers did not reply, or the answer failed DNSSEC validation. The DNS Propagation Checker asks again with DNSSEC checking off, which shows which of the two it is.
Still stuck? Ask about DNS Lookup and anybody who knows can answer. No account needed.
Same job, other tools: AS Number Lookup – Turn an AS number into the network name, registry and allocation date · IP to ASN Lookup – Map an IP address to the ASN that announces it, with the BGP prefix.
On the related tools: Open Port Checker – See if a port forwarded on your router is reachable from the internet.