It can be anything! An apex, subdomain, or even a URL.

Results forns2.dns.com.cn

Resolver

Location

A

Name	TTL	Value
ns2.dns.com.cn	120	61.172.183.76Chinanet SH / China Telecom (Group)
ns2.dns.com.cn	120	61.240.129.147Unicom / CHINA UNICOM China169 Backbone

Name	TTL	Value
ns2.dns.com.cn	120	240c:4082:ffff:ff01:0:d:0:69