Robtex

Up: 192.51.228.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.51.229.0/25
Down right: 192.51.229.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.51.229.3	A+PTR	nss1.sc.mufg.jp
192.51.229.3	A	nss1.is.sc.mufg.jp
192.51.229.3	A	nss1.mumss.com
192.51.229.6	A+PTR	nss2.sc.mufg.jp
192.51.229.6	A	nss2.is.sc.mufg.jp
192.51.229.6	A	nss2.mumss.com
192.51.229.9	PTR	nss0.sc.mufg.jp