Delegating subdomains to separate DNS servers

To manage zones of your subdomains separately, you need to delegate them to separate DNS servers. To do that, you need to add to your domain’s zone file NS records pointing to DNS servers authoritative for your subdomains.

To add such records, you need to:

Go to DNS-master editor and select domain for editing
Add new NS record NS name_of_DNS_server. NS name_of_second_ DNS_server.
where: - your domain or host name, dot after name is required;
name_of_DNS_server., name_of_second_ DNS_server. — names of DNS servers where you will manage zones of your subdomains. Dot after name is required.
Upload zone to DNS server

The changes will take effect in 1—2 minutes.