Nameserver Lookup
Look up authoritative nameservers for any domain. Verify which DNS provider is managing a domain and troubleshoot delegation issues instantly.
Ready to lookup DNS records
Enter a domain name above and click "Lookup" to check DNS records across 28 global servers.
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Authoritative Nameserver Lookup
Nameservers are the 'source of truth' for your entire domain. Our NS lookup tool identifies exactly which DNS servers are currently responsible for hosting your zone file. This is the first step in any DNS troubleshooting: if you are editing records at one host but the world is looking at nameservers at another host, your changes will never take effect.
Identify DNS Provider
Instantly see if a domain is using premium DNS (like Cloudflare) or basic registrar-provided nameservers.
Global Authority Verification
Check that all assigned nameservers are responding with consistent data to prevent 'split-brain' DNS issues.
Verify Registrar Delegation
Confirm that the nameservers you set at your registrar have correctly propagated to the TLD root servers.
Nameservers (NS records) are the authoritative DNS servers that store all other DNS records for a domain. A nameserver lookup reveals which provider (e.g., Cloudflare, AWS, GoDaddy) currently controls your domain's DNS. Changes made at your domain registrar to point to new nameservers typically take 24 to 48 hours to propagate fully.
"Never mix nameservers from two different providers (e.g., using two from Cloudflare and two from GoDaddy). This causes 'Lame Delegation' and can lead to random, hard-to-debug resolution failures where some users see your new site and others see your old one indefinitely."
What is this tool?
This tool finds the 'Nameservers' for a domain. Nameservers are the master servers that hold all the DNS rules for a website.
How to use it
- Enter the domain name.
- Click 'Lookup'.
- The tool will display the 2 to 4 nameservers currently controlling the domain.
Real-World Use Cases
- Checking if your domain transfer to a new host was successful.
- Verifying if a domain is using Cloudflare for performance and security.
- Troubleshooting why your DNS changes aren't working (you might be editing the wrong zone!).
Example Outputs
The result will show the nameservers, e.g., 'ns1.digitalocean.com' and 'ns2.digitalocean.com'.
How to Change Your Nameservers Without Downtime
The secret to a zero-downtime nameserver migration is to mirror your entire zone file at the *new* provider before changing the delegation at the registrar. Once both providers are serving the exact same records, you can update the NS records at your registrar.
Even during the 48-hour propagation period, it won't matter which nameserver a visitor hits; both will return the correct IP address. Only after the propagation checker shows 100% completion should you deactivate the old DNS zone.
Frequently Asked Questions
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