Viewing Network Gateway and Netmask
Please login to the VPS control panel at https://crownpanel.com
Click on "Manage" beside the VPS you wish to manage
Next, Click on the "Manage Network" tab
Here you will find the gateway and netmask of each IP address attached to your VPS.
Finding your IPv6 Range, Netmask and Gateway
IPV6 Ipaddress,Gateway and Netmask will be like this.