How to solve default server is unknown Issue for nslookup

When you type command “nslookup” you might encounter following error stating

Default Server : UnKnown

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Solution

right click reverse lookup zone and click new zone

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create a primary zone (by default it is already selected)

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type the network ID (subnet of your network)

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Then don’t forget to select the Reverse lookup zone name:

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Then click next and keep the default dynamic update type and complete the new zone wizard

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Still you might encounter the same error.

Right click on the newly created zone and select “New Pointer (PTR)…”

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Enter the ip address of the DNS server and name of the Host and click OK

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Now try “nslookup” and you will see the correct server name. And don’t forget to flush DNS (ipconfig /flushdns) if you still find the same result.

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