Nameserver Lookup.

Find the authoritative nameservers (NS records) responsible for any domain.

What is an NS Record?

An NS (Name Server) Record identifies which DNS servers are authoritative for a specific domain. Essentially, it tells the rest of the internet: "If you want to find the A, MX, or CNAME records for this domain, go ask these specific servers."

Why are NS Records important?

DNS Delegation: They delegate a portion of the DNS space to specific servers (like Cloudflare, AWS Route 53, or your hosting provider).
Troubleshooting: If you change your hosting but your NS records still point to your old host, your new website won't load—even if you've updated your A records correctly.
Redundancy: Most domains have at least two NS records. If one name server goes down, the other takes over to keep your site online.

Frequently asked questions:

How many NS records should I have?

At a minimum, you should have two. This provides redundancy. Many professional DNS providers (like Cloudflare or Route 53) will provide four to ensure maximum uptime.
Can I have NS records pointing to two different providers?

Technically yes, but it is highly discouraged. This is called "split DNS" and can lead to unpredictable behavior where some users see one version of your site and others see another. Always point all NS records to a single provider's cluster.
What is the difference between an NS record and a Glue record?

An NS record tells the internet the name of the server (e.g., ns1.provider.com). A Glue record is used when the name server is a subdomain of the domain itself (e.g., ns1.example.com), providing the IP address so the lookup doesn't get stuck in a loop.
How long does an NS record change take to propagate?

NS record changes are among the slowest to update because they are cached at the Registry level (like Verisign for .com). Propagation typically takes 24 to 48 hours.

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