Robtex

Up: 217.30.16.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 217.30.16.0/25
Down right: 217.30.16.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.30.16.2	A+PTR	ns2.globaltt.com
217.30.16.2	A	mx2.globaltt.com
217.30.16.3	A+PTR	ns3.globaltt.com
217.30.16.3	A	mx3.globaltt.com
217.30.16.5	A+PTR	ns5.globaltt.com
217.30.16.6	A+PTR	www.globaltt.com
217.30.16.6	A+PTR	sales.globaltt.com
217.30.16.6	A	africa.online
217.30.16.8	A+PTR	outmail.globaltt.com
217.30.16.10	PTR	10.16.30.217.globaltt.com
217.30.16.10	A	mailing.globaltt.com
217.30.16.11	PTR	www.svno.net
217.30.16.11	A	svno.co
217.30.16.11	A	svno.mobi
217.30.16.174	PTR	mail.globaltt.com
217.30.16.250	PTR	250.16.30.217.globaltt.com
217.30.16.251	PTR	251.16.30.217.globaltt.com