NS Lookup
Count and de-duplicate pasted name server lines.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
NS Lookup
How to use this tool
- Enter your values in the fields above.
- Press Generate to see the result.
- Use Load sample to try the worked example, Copy result to copy it, or Clear to start again.
Worked example
Two lines ns1 and ns2, with ns1 repeated, give 2 unique name servers.
What this tool does not do / Limits
This tool only reads the lines you paste. It performs no live DNS lookup and cannot prove which name servers a domain actually uses today.
Frequently asked questions
Is this a live DNS lookup?
No. You paste the lines; this page never queries DNS.
Are duplicates removed?
Yes. The same host listed twice is counted once.
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