Create and Point a Subdomain to our system from another DNS provider without delegating our name servers using NS records
NS Records stands for nameserver records. You can add additional NS records to a domain if you plan on using another provider for some of your subdomains.
These records indicate which name servers are authoritative for the zone/domain. NS Records are primarily used if you want to break your domain into subdomains. Subdomains indicate you are delegating a portion of a domain name to a different group of name servers, thus creating NS records to point the name of the subdomain to different name servers.