ns2.hp.com has no NS records.
NS records for this zone are defined at hp.com.
NS records for this zone are defined at hp.com.
Question and response
Question
dig ns2.hp.com. NS
Answer
The response has no answer records.
Authority
hp.com. 900 SOA txa01hpiibpe.ams.hp.net. hostmaster.hp.com. 443247649 3600 3600 2419200 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0