Nslookup shows which DNS data a resolver returns for a domain: IP addresses, mail servers, nameserver records, and other details that matter for websites and email.
DNS verification
The tool helps confirm that a domain points to the expected A and AAAA addresses and that email is configured through the correct MX records.
Finding errors
If a website does not open for all users, nslookup helps separate a DNS problem from a web server error, browser cache issue, or network restriction.
After changes
After changing DNS records, hosting, or email providers, check the result more than once: different resolvers may refresh their data at different times.
NSLookup DNS checker online
Run NSLookup checks for a domain and inspect DNS records from the InetTools network. The tool helps verify A, AAAA, MX, NS, TXT and other records, compare expected values and diagnose domain resolution issues.
Use it after DNS changes, mail setup, hosting migration or when a site opens for some users but not others. The result gives a quick view of what the resolver currently returns.
✓Inspect DNS records returned for a domain from the InetTools network.
✓Useful after changing hosting, DNS records or mail settings.
✓Check A, AAAA, MX, NS, TXT and other records without command-line tools.
✓Compare expected DNS values with the current resolver response.
✓Check DNS records after domain changes to understand whether updates have propagated.
✓Use the result to debug website, email and hosting configuration issues.
