Robtex

Up: 189.89.156.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 189.89.158.0/24
Down right: 189.89.159.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
189.89.158.112	PTR	189-89-158-112.static.itsweb.com.br
189.89.158.150	PTR	srvtmg.mfplan.com.br
189.89.158.150	A	mfplan.com.br
189.89.158.150	A	mailbeta.mfplan.com.br
189.89.159.43	PTR	mail5.sanave.com.br
189.89.159.43	A	mail5.sanave.com
189.89.159.43	A	mail5.saveiro.com.br
189.89.159.101	A+PTR	smtpgw.mfx.com.br
189.89.159.105	A	sac.mfx.com.br
189.89.159.122	PTR	189-89-159-122.static.itsweb.com.br