cdn1.starfall.com has no NS records.
NS records for this zone are defined at starfall.com.
NS records for this zone are defined at starfall.com.
Question and response
Question
dig cdn1.starfall.com. NS
Answer
The response has no answer records.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0