For Network Discovery, you can upload a hosts file in the form:

ipaddress [ hostname | DNS-name ]

—Where the names in the hosts file will override the reverse DNS lookup for a matching DNS name.

Example

192.0.2.8 ws2.example.com 203.0.113.8 mail01.example.com

Tip: WhatsUp Gold discovery also supports upload of an unformatted list of IP addresses.