hosted.rocketpbx.com has no NS records.
NS records for this zone are defined at rocketpbx.com.
NS records for this zone are defined at rocketpbx.com.
Question and response
Question
dig hosted.rocketpbx.com. NS
Answer
The response has no answer records.
Authority
rocketpbx.com. 86400 SOA dns1.rocketinternet.net. hostmaster.rocketinternet.net. 2008112900 21600 1800 604800 86400
Additional
The response has no additional records.