To determine the DNS zone server, you need to use the whois/rdap service, specifying the domain name in it, as shown in the examples.

The DNS servers field will list the authoritative servers for this domain. Therefore, DNS records in the DNS editor must be entered in them.

For virtual hosting service

ns1.synay.net
ns2.synay.net

or

ns1.ripnet.ru
ns2.ripnet.ru

In both cases, record management must be carried out in the hosting control panel.

For DNS hosting service

ns1.nodename.ru
ns2.nodename.ru

For these DNS servers, record management is carried out in the personal account - the DNS hosting service.

This is especially true when you use several services at the same time. The whois/rdap service allows you to accurately determine which service to use to manage DNS records.

Notes:

DNS servers are the servers that are specified when registering a domain and are changed in the personal account where you registered the domain, if with us, then in the domains section.

DNS records are records that affect the settings of the domain, as well as subdomains, mail, etc. It is in the DNS records that the IP address of the server where the site is stored is specified. As well as mail and other services.

Technically: hosting, domain, website server and mail server can be configured with one service provider or separated and this is determined by the DNS record settings for each service.