cname.instatus.com has no NS records.
NS records for this zone are defined at instatus.com.
NS records for this zone are defined at instatus.com.
Question and response
Question
dig cname.instatus.com. NS
Answer
The response has no answer records.
Authority
instatus.com. 1800 SOA donovan.ns.cloudflare.com. dns.cloudflare.com. 2398390148 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0