Robtex

Up: 5.100.100.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 5.100.100.0/24
Down right: 5.100.101.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
5.100.100.1	PTR	5-100-100-1.ipoe.vladlink.net
5.100.100.10	PTR	5-100-100-10.ipoe.vladlink.net
5.100.100.24	PTR	5-100-100-24.ipoe.vladlink.net
5.100.100.24	A	mail.pca.ru
5.100.100.44	PTR	5-100-100-44.ipoe.vladlink.net
5.100.100.88	PTR	5-100-100-88.ipoe.vladlink.net
5.100.100.88	A	techways.ru
5.100.100.88	A	vbay.su
5.100.100.100	PTR	5-100-100-100.ipoe.vladlink.net
5.100.100.120	A	brand-posuda.ru
5.100.100.120	A	babygarage.ru
5.100.100.223	PTR	5-100-100-223.ipoe.vladlink.net
5.100.101.82	PTR	5-100-101-82.ipoe.vladlink.net
5.100.101.213	PTR	5-100-101-213.ipoe.vladlink.net
5.100.101.213	A	aduser.info
5.100.101.252	PTR	5-100-101-252.ipoe.vladlink.net