One of the first online design services was uCoz. It remains relevant to this day. In order to direct your domain to this service, you need to change the name servers.
To do this, first go to the "Domains" section of your NIC.UA personal account and click on the gear-shaped button next to the order for the required domain.
In the domain order properties, under NS Servers, select Custom Name Servers.
Next to "List of your own name servers" click the "Change" button. Then remove the current NS from the list and add the following:
Then click the "Save" button.
The changes will take effect within 4-24 hours when the ISP's DNS cache is updated.