ghl0.ghld99f3f5.use4.send.mailgun.net has no NS records.
NS records for this zone are defined at ghld99f3f5.use4.send.mailgun.net.
NS records for this zone are defined at ghld99f3f5.use4.send.mailgun.net.
Question and response
Question
dig ghl0.ghld99f3f5.use4.send.mailgun.net. NS
Answer
The response has no answer records.
Authority
ghld99f3f5.use4.send.mailgun.net. 300 SOA ns-cloud-a1.googledomains.com. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 300
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0