Robtex

Up: 189.84.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 189.84.240.0/23
Down right: 189.84.242.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
189.84.240.0	PTR	189.84.240.0.static.gigalink.net.br
189.84.240.2	PTR	189.84.240.2.static.ffsd.br
189.84.240.2	A	ns01.ffsd-nf.edu.br
189.84.240.2	A	ffsd.br
189.84.240.3	PTR	189.84.240.3.static.ffsd.br
189.84.240.4	PTR	189.84.240.4.static.gigalink.net.br
189.84.240.4	A	mail.ffsd-nf.edu.br
189.84.240.4	A	mail.ffsd.br
189.84.240.44	PTR	189.84.240.44.static.gigalink.net.br
189.84.240.58	PTR	189.84.240.58.static.gigalink.net.br
189.84.240.98	A+PTR	srvmail.sousaecouto.com.br
189.84.240.178	PTR	mail.criweb.srv.br
189.84.240.178	PTR	ns1.criweb.srv.br
189.84.240.178	A	mail.hak.com.br
189.84.240.179	PTR	189.84.240.179.static.gigalink.net.br
189.84.240.194	PTR	189.84.240.194.static.sloja.net
189.84.240.194	A	ns2.scupen.net.br
189.84.240.194	A	ns2.scupen.net
189.84.240.197	PTR	189.84.240.197.static.gigalink.net.br
189.84.240.197	A	240.194.static.sloja.net
189.84.240.197	A	189.84.240.207.static.sloja.net
189.84.240.207	PTR	189.84.240.207.static.sloja.net
189.84.240.207	A	apaixonados.com
189.84.240.210	A	booze.com.br
189.84.240.213	PTR	189.84.240.213.cable.gigalink.net.br
189.84.240.213	A	jangadabiquinis.com.br
189.84.240.250	PTR	189.84.240.250.cable.gigalink.net.br
189.84.240.250	A	smtp01.stamonline.com.br
189.84.240.251	PTR	189.84.240.251.cable.gigalink.net.br
189.84.240.251	A	www.stamonline.com.br
189.84.240.251	A	stamonline.com.br
189.84.241.2	PTR	189.84.241.2.gigalink.net.br
189.84.241.72	A	zimbra.3f.com.br
189.84.241.77	PTR	srvmail.sousaecouto.com.br
189.84.241.85	PTR	189.84.241.85.gigalink.net.br
189.84.242.126	A	mazepool.com
189.84.242.186	PTR	189.84.242.186.cable.gigalink.net.br
189.84.242.186	A	ccncomercial.com