nslookup

Additional Notes

nslookup queries DNS records. It is older but still common on many systems and tutorials.

For modern detailed DNS work, dig is usually preferred. For quick simple checks, host is often easier.

Syntax

nslookup name [server]
nslookup

Parameters

• options: Flags that change how nslookup behaves.
• name: Domain name or IP address to query.

Examples

nslookup example.com

Resolve a domain using the default resolver.

nslookup example.com 8.8.8.8

Ask a specific DNS server.

nslookup -type=MX example.com

Query MX records.

nslookup

Start interactive mode.

> server 1.1.1.1
> set type=TXT
> example.com
> exit

Use interactive DNS queries.

Practical Notes

• nslookup is widely available, including on Windows.
• Use dig when you need detailed sections, trace, or precise DNS debugging.
• DNS failures can be resolver-specific.
• Check /etc/resolv.conf or resolvectl status for resolver configuration.