c.storage.googleapis.com has no NS records.
NS records for this zone are defined at googleapis.com.
NS records for this zone are defined at googleapis.com.
Question and response
Question
dig c.storage.googleapis.com. NS
Answer
The response has no answer records.
Authority
googleapis.com. 60 SOA ns1.google.com. dns-admin.google.com. 884330780 900 900 1800 60
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0