Robtex

Up: 154.73.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 154.73.220.0/23
Down right: 154.73.222.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
154.73.220.5	A+PTR	ns1.bundunet.com
154.73.220.6	PTR	relay.bundunet.com
154.73.220.6	A+PTR	mail.bundurelay.com
154.73.220.6	PTR	smtp.bundurelay.com
154.73.220.131	A	mail.greenfieldsfarm.co.za
154.73.220.131	A	remote.greenfieldsfarm.co.za
154.73.220.131	A	mail.greenfieldsfoton.co.za
154.73.220.138	A+PTR	mail.weston.co.za
154.73.220.190	PTR	mail.treverton.co.za
154.73.220.190	PTR	smtp.treverton.co.za
154.73.220.190	PTR	webmail.treverton.co.za