agent.hsunderground.com has no NS records.
NS records for this zone are defined at hsunderground.com.
NS records for this zone are defined at hsunderground.com.
Question and response
Question
dig agent.hsunderground.com. NS
Answer
The response has no answer records.
Authority
hsunderground.com. 300 SOA ns1.dyna-ns.net. hostmaster.hsunderground.com. 2026021401 16384 2048 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0