cf-198-41-222-155.cloudflare.com has no NS records.
NS records for this zone are defined at cloudflare.com.
NS records for this zone are defined at cloudflare.com.
Question and response
Question
dig cf-198-41-222-155.cloudflare.com. NS
Answer
The response has no answer records.
Authority
cloudflare.com. 300 SOA ns3.cloudflare.com. dns.cloudflare.com. 2399416604 10000 2400 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0