Root zone
These servers manage the DNS root zone
all servers delegate to
com.
These servers manage the com zone
all servers delegate to
paloaltonetworks.com.
These servers manage the paloaltonetworks.com zone
all servers delegate to
dlp.paloaltonetworks.com.
These servers manage the dlp.paloaltonetworks.com zone
all servers delegate to
email.dlp.paloaltonetworks.com.
These servers manage the email.dlp.paloaltonetworks.com zone