Robtex

Up: 146.121.22.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 146.121.22.0/25
Down right: 146.121.22.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
146.121.22.27	A+PTR	spisv001.gcm.com
146.121.22.27	PTR	spisv001.greenwich-capital.com
146.121.22.27	PTR	spisv001.greenwichcapital.com
146.121.22.28	A	saisv001.gcm.com
146.121.22.101	A	origin-strategy.rbsm.com
146.121.22.101	A	strategy.rbsm.com
146.121.22.103	A	mail.rbsgc.com
146.121.22.108	A	cunderwriter.rbsgc.com
146.121.22.120	PTR	rbsgc.com
146.121.22.120	A	www.gcm.com
146.121.22.120	A	www2.gcm.com
146.121.22.132	PTR	www3.rbsgc.com
146.121.22.133	A	www4.rbsgc.com
146.121.22.139	A+PTR	www3.gcm.com
146.121.22.143	A	media.gcm.com
146.121.22.220	A	mibevents.rbs.com