Robtex

Up: 45.4.120.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 45.4.120.0/24
Down right: 45.4.121.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
45.4.120.10	PTR	static-45-4-120-10.r3internet.net.br
45.4.120.10	A	ns1.r3internet.com.br
45.4.120.10	A	mail.r3internet.com.br
45.4.120.12	PTR	static-45-4-120-12.r3internet.net.br
45.4.120.12	A	r3tecnologia.com.br
45.4.120.12	A	ns1.escolacraveiro.com.br