How to Find Your Website's IP Address and Name Servers
To find the IP address and the Name Servers assigned to a website, go to your Client Area > Websites. From the list of your websites, locate the one you want to check and click the kebab menu next to it and click Website Settings.
Then click on the kebab menu and select Server Details.
The light-box which will appear on the screen will see the IP address of the website, and its Name Servers (NS 1 and NS 2).
If you need IPs of the nameservers you click the Show IP Addresses button:
ns1.siteground.net (75.2.77.104)
ns2.siteground.net (99.83.229.113)
Alternatively, you can also see this information in the Dashboard of your Site Tools > Site Information section.