DNS Lookup

DNS Lookup queries the Domain Name System to reveal the records that power how a domain resolves and behaves across the internet. By entering any domain name, you can retrieve A and AAAA records (the IPv4 and IPv6 addresses a hostname points to), CNAME aliases, MX records that route email, NS records identifying the authoritative nameservers, TXT records used for verification and policy, and SOA records describing the zone's primary configuration. This makes it an essential first stop for diagnosing why a site or service resolves the way it does.

Under the hood, a DNS lookup walks the resolution chain that browsers and mail servers perform automatically: a resolver consults the root servers, follows the delegation to the top-level domain, and finally queries the domain's authoritative nameservers for the requested record type. The tool surfaces the raw answers along with TTL (time-to-live) values, which tell you how long each record may be cached before resolvers refresh it. Understanding TTLs is key to predicting how quickly a change will take effect.

Common use cases include verifying that a new website is pointing at the correct server IP, confirming MX records before launching email, checking TXT records for domain ownership verification with services like Google or Microsoft, and troubleshooting CNAME chains for CDNs and SaaS products. Developers and sysadmins lean on it whenever a migration, DNS provider change, or email delivery problem needs a definitive answer about what the authoritative records actually say.

A practical tip is to compare the records you see here against what your registrar or DNS host shows in its control panel; mismatches usually point to a propagation delay or an edit applied to the wrong zone. If you suspect caching is masking a recent change, pair this tool with a DNS Propagation check to see how different global resolvers are answering, and use Reverse DNS to confirm that an IP maps back to the hostname you expect.