www.mailboxes.stephychung.com has no NS records.
NS records for this zone are defined at stephychung.com.
NS records for this zone are defined at stephychung.com.
Question and response
Question
dig www.mailboxes.stephychung.com. NS
Answer
The response has no answer records.
Authority
stephychung.com. 300 SOA ns-cloud-c1.googledomains.com. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 300
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0