> For the complete documentation index, see [llms.txt](https://docs.dnscontrol.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dnscontrol.org/language-reference/domain-modifiers/ns.md).

# NS

`NS` adds a [Name server record](https://www.rfc-editor.org/rfc/rfc1035) to the domain. The name should be the relative label for the domain.

The name may not be `@` (the bare domain), as that is controlled via [`NAMESERVER()`](/language-reference/domain-modifiers/nameserver.md). The difference between `NS()` and [`NAMESERVER()`](/language-reference/domain-modifiers/nameserver.md) is explained in the [`NAMESERVER()` description](/language-reference/domain-modifiers/nameserver.md).

Target should be a string representing the NS target. If it is a single label we will assume it is a relative name on the current domain. If it contains *any* dots, it should be a fully qualified domain name, ending with a `.`.

{% code title="dnsconfig.js" %}

```javascript
D("example.com", REG_MY_PROVIDER, DnsProvider(DSP_MY_PROVIDER),
  NS("foo", "ns1.example2.com."), // Delegate ".foo.example.com" zone to another server.
  NS("foo", "ns2.example2.com."), // Delegate ".foo.example.com" zone to another server.
  A("ns1.example2.com", "10.10.10.10"), // Glue records
  A("ns2.example2.com", "10.10.10.20"), // Glue records
);
```

{% endcode %}