> For the complete documentation index, see [llms.txt](https://docs.greennode.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.greennode.ai/vserver/compute-hcm03-1a/vpc/dhcp-options-sets/dns-server-ip-address.md).

# DNS Server IP Address

The default IP addresses of GreenNode for use in DHCP options sets of **HCM Region** are:

* <mark style="color:blue;">**10.166.12.196**</mark>
* <mark style="color:blue;">**10.166.12.197**</mark>

The default IP addresses of GreenNode for use in DHCP options sets of **HAN Region** are:

* <mark style="color:blue;">**10.236.10.196**</mark>
* <mark style="color:blue;">**10.236.10.197**</mark>

This ensures that you can access the basic services of GreenNode. You can click "**Set to optimize**" to specify DNS server IP addresses to meet your needs.

{% hint style="info" %}
**Important**

Before customizing the DNS server IP addresses, note the following:

* The system is automatically assigning the GreenNode IPs which listed above. If you remove these addresses, you may not be able to use the basic services of GreenNode.
* VNG allows you to set up to a maximum of 4 DNS server IP addresses in one DHCP options set.
  {% endhint %}