Robtex

Up: 84.21.4.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 84.21.4.0/25
Down right: 84.21.4.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
84.21.4.0	PTR	84.21.4.0.zt.hu
84.21.4.60	PTR	sc440.vendtex.hu
84.21.4.60	A	vendtex.hu
84.21.4.60	A	www.vend-tex.com
84.21.4.68	A	blvk.hu
84.21.4.82	A	mail.greenfieldhotel.net
84.21.4.202	A+PTR	84.21.4.202.zt.hu
84.21.4.255	A+PTR	84.21.4.255.zt.hu