NS Lookup

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NS Lookup: Check The Name Server of a Domain

With EXPERTE.com's NS Lookup, you can easily fetch a domain's name server entries in no time. To get started, just enter the domain you want to check in the uppermost field.

After that, you'll receive a table containing the domain's NS entries. In the event that you would prefer to determine the IP of a domain (A- and AAAA entries), please use our DNS Check instead.

NS Entry - Structure

A name server entry tells you which name server is responsible for a particular domain.

NS entries are structured as follows:






Domain for which the entry is


Name of the authoritative name server for this domain


Time to live (how long the entry should remain in the cache)

NS Lookup - Process

In order to determine the name server for a domain, such as experte.de, our tool does the following:

  • 1.

    The client or DNS resolver requests the name server entry for the domain (in our case, experte.de) from a so-called root name server. This replies with the following data:

    NS a.nic.de.
    NS f.nic.de.

  • 2.

    The client or DNS resolver now requests the name server entries from the DNS server that is responsible for the .de zone. This, in turn, answers with the following information:

    NS tom.ns.cloudflare.com.
    NS coco.ns.cloudflare.com.

  • 3.

    (Optional) The client or DNS resolver can now determine the IP address for the domain (experte.de) by requesting the A record from the name server tom.ns.cloudflare.com or coco.ns.cloudflare.com.

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Janis von Bleichert studied business informatics at the TU Munich and computer science at the TU Berlin, Germany. He has been self-employed since 2006 and is the founder of EXPERTE.com. He writes about hosting, software and IT security.
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