v59.v5c0b6788.use4.send.mailgun.net has no NS records.
NS records for this zone are defined at v5c0b6788.use4.send.mailgun.net.
NS records for this zone are defined at v5c0b6788.use4.send.mailgun.net.
Question and response
Question
dig v59.v5c0b6788.use4.send.mailgun.net. NS
Answer
The response has no answer records.
Authority
v5c0b6788.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