ip2.filter04.hostcontrol.com has no NS records.
NS records for this zone are defined at hostcontrol.com.
NS records for this zone are defined at hostcontrol.com.
Question and response
Question
dig ip2.filter04.hostcontrol.com. NS
Answer
The response has no answer records.
Authority
hostcontrol.com. 300 SOA ns1-34.azure-dns.com. azuredns-hostmaster.microsoft.com. 1 3600 300 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0