cf00.mailer.myclickfunnels.com has no NS records.
NS records for this zone are defined at myclickfunnels.com.
NS records for this zone are defined at myclickfunnels.com.
Question and response
Question
dig cf00.mailer.myclickfunnels.com. NS
Answer
The response has no answer records.
Authority
myclickfunnels.com. 1800 SOA sneh.ns.cloudflare.com. dns.cloudflare.com. 2399546146 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0