What is a nameserver lookup?
Quick answerA nameserver lookup returns the NS records for a domain: the servers that hold its DNS records. They usually reveal the DNS provider (a registrar, Cloudflare, a host), so you know where to make DNS changes. Parking or marketplace nameservers often mean the domain is for sale.
Why nameservers matter
Your DNS records only count at the provider your nameservers point to. If you edit records at your registrar while the nameservers point to Cloudflare or your host, nothing changes. That's the most common DNS mistake.
What the nameservers tell you
- Registrar defaults: the domain uses the registrar's free DNS.
- Cloudflare or a CDN: DNS and often security are managed there.
- Hosting company: the host controls DNS. Common with website builders.
- Parking or marketplace servers: the domain is probably parked, and may be for sale. Check the owner lookup.
Changing nameservers safely
- Recreate every existing record (A, MX, TXT…) at the new provider first.
- Then switch nameservers at your registrar.
- Expect up to 24-48 hours for all resolvers to update, and compare them here.
Nameserver lookup FAQ
Is this nameserver lookup free?
Yes, unlimited and free with no sign-up. Queries go from your browser to public DNS-over-HTTPS resolvers (Cloudflare and Google).
Why do two resolvers show different results?
DNS answers are cached for the record's TTL. Right after a change, some resolvers still serve the old value. Wait for the TTL to expire and check again.
Can I look up a subdomain?
Yes. Type the full name, for example mail.example.com or _dmarc.example.com.