DNS Lookup
Use DNS Lookup to check domain records, including A, AAAA, MX, NS, TXT, and SOA. Review host details and troubleshoot website or email configuration.
DNS Lookup for domain records
DNS Lookup checks the DNS records returned for a host so you can investigate website routing, mail configuration, and domain setup. Enter a domain or subdomain to review the available records without changing its configuration.
How to use DNS Lookup
- Enter the host name, such as example.com, in the Host field. Use the host rather than a full page URL.
- Select Submit to run the lookup.
- Review the record tables and compare the returned values with the settings expected by your hosting, email, or DNS provider.
- Check the exact subdomain separately when troubleshooting www, mail, or another host.
Understanding DNS records
- A and AAAA: Address records used to connect a host to IPv4 and IPv6 addresses.
- CNAME: An alias that points a host name to another host name.
- MX: Mail server targets and their priorities.
- NS: Nameservers listed for the domain.
- TXT: Text values that may include verification tokens or email policy information.
- SOA: Administrative information about the DNS zone.
The TTL column shows the cache lifetime associated with a returned record. Not every host has every record type. A missing table is not, by itself, proof that a domain is broken.
When a lookup is useful
After changing a website address record, compare the returned address with the intended destination. For an email issue, review MX targets and relevant TXT values. Results represent the lookup performed here, rather than a test from every network or resolver.
DNS Lookup questions
Does this tool change my DNS settings?
No. It displays lookup results. Make configuration changes through the provider that manages your DNS zone.
Why can results differ after a change?
Cached answers and differences between resolvers can affect what is returned. Confirm the saved configuration with your DNS provider and check again when appropriate.
Can I check a subdomain?
Yes. Enter the complete host name you want to investigate. The root domain and a subdomain can have different records.
Continue checking the domain
Use IP Lookup to inspect approximate details for a returned address, Reverse IP Lookup to look for an associated host name, and SSL Lookup to inspect the certificate presented by a host.
Similar tools
Use Reverse IP Lookup to look for a host name associated with an IP address. Review the result, understand its limits, and continue your network checks.
Use IP Lookup to review approximate location and timezone details for an IP address. Understand the results and their limits before drawing conclusions.
Use SSL Lookup to inspect the certificate presented by a website. Review the returned details and understand what a certificate check can and cannot establish.
Use Whois Lookup to review available domain registration details. Enter a domain name, interpret public records, and investigate registrar or nameserver information.
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