37.46.147.34.bc.googleusercontent.com has no NS records.
NS records for this zone are defined at googleusercontent.com.
NS records for this zone are defined at googleusercontent.com.
Question and response
Question
dig 37.46.147.34.bc.googleusercontent.com. NS
Answer
The response has no answer records.
Authority
googleusercontent.com. 60 SOA ns1.google.com. dns-admin.google.com. 876167751 900 900 1800 60
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0