How it works
This tool looks up the domain in the DNS system for its A records (IPv4) and AAAA records (IPv6). It's the same lookup your browser does every time you visit a website by name instead of typing a raw IP address.
FAQ
- Why does a domain sometimes resolve to multiple IP addresses?
- Many sites use several servers for load balancing and redundancy. DNS can return more than one A or AAAA record for the same domain. Which one your device uses can change between lookups.
- What's the difference between the IPv4 and IPv6 results?
- IPv4 and IPv6 are two separate, independent addressing systems. A domain may have only IPv4 addresses (A records), only IPv6 addresses (AAAA records), or both. Most modern sites support both.
- Why did my lookup return no results?
- The domain may not exist, or it may be misspelled. It's also possible the domain genuinely has no A or AAAA records. That's uncommon, but it happens for domains used only for other purposes, like email.
- What does the "DNS Server" option change?
- This picks which public DNS resolver answers your query. You can choose Google, Cloudflare, Quad9, or OpenDNS instead of the default. It matters for domains that use DNS-based load balancing or geo-routing, because different resolvers can sometimes return different results for the same domain. It does not change your own location. Every option here still queries from the same server, just through a different resolver's network.