DNS Tools

DNS Lookup

Instantly look up A, AAAA, MX, TXT, NS, CNAME, SOA, and CAA records for any domain.

Enter any domain below to instantly look up its A, AAAA, MX, TXT, NS, CNAME, SOA, and CAA records.

More DNS Tools

TTL Checker A Record Lookup DNSSEC Checker AAAA Record Lookup SRV Record Lookup MX Record Lookup CAA Record Lookup TXT Record Lookup

JustChecker tracks your DNS records continuously and alerts you the moment something changes.

What Is DNS Lookup?

DNS (Domain Name System) translates a domain name into the records that tell the internet where its website, email and services live. This tool queries a domain's public DNS and shows its A, AAAA, MX, TXT, NS, CNAME, SOA and CAA records in one place.

When to Use It

After changing DNS at your registrar or DNS provider, to confirm the new values.
When a website or email stops working after a migration.
To see how an existing domain is set up before making changes.

How to Use It

Enter a domain or subdomain.
Run the lookup and review each record type.

Understanding the Result

A and AAAA records point to IPv4 and IPv6 addresses; MX records route email; TXT records hold SPF, DKIM and verification codes; NS records show who hosts the DNS; CAA records restrict which certificate authorities may issue SSL certificates. An empty section simply means that record type is not set.

Limitations

DNS answers can be cached, so a recent change may not appear everywhere yet - use the DNS Propagation Checker to compare resolvers. For a single record type, the dedicated lookups such as the MX Record Lookup give a focused view.

Frequently Asked Questions

It queries the most commonly-needed record types for a domain in one pass - typically A, AAAA, MX, TXT, and NS - giving a quick overview before drilling into any single record type with a dedicated tool.

DNS uses a globally distributed system of resolvers and caches. Propagation delays, geographic DNS routing (GeoDNS), and differing cache expiry (TTL) times mean two different resolvers can briefly show different results after a recent change.

Either the domain has no records of the queried type configured at all, or the domain's nameservers themselves are not resolving - the latter usually means a nameserver misconfiguration at the registrar level, not a problem with any individual record.

Most changes propagate globally within a few minutes to a few hours, bounded by the record's TTL (time-to-live) value - a record with a 24-hour TTL can take up to 24 hours to fully clear from caches worldwide.

This tool gives a fast, combined snapshot across several record types at once; the dedicated A/AAAA/MX/TXT/NS/CNAME/SOA tools each query and format that one specific record type in more detail.

Yes - an unregistered domain will return no nameserver or record data whatsoever, distinct from a registered domain that simply has no DNS records configured yet.

No - this is a fresh, server-side query independent of your own device's DNS cache, so it accurately reflects the domain's current public DNS state even if your browser is still showing you a stale, locally-cached result.

Multiple A records for the same hostname is a common load-balancing or high-availability technique - DNS returns several valid addresses and clients (or a load balancer) choose among them.