Robtex

Up: 186.250.32.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 186.250.36.0/23
Down right: 186.250.38.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
186.250.36.0	PTR	0-36-250-186.static-fiber.empiretelecom.com.br
186.250.36.3	PTR	mx.empirehost.com.br
186.250.36.3	A	mx.zagonel.com.br
186.250.36.3	A	empirehost.com.br
186.250.36.6	PTR	ns1.empirehost.com.br
186.250.36.7	PTR	ns2.empirehost.com.br
186.250.36.15	PTR	mx.eamais.com.br
186.250.36.20	A	mail.eamais.com.br
186.250.36.35	A+PTR	mx.empirehost.com.br
186.250.36.35	A	mx.empiretelecom.com.br
186.250.36.36	A	webentrega.com
186.250.36.40	PTR	host1.empiretelecom.com.br
186.250.36.40	A	ns1-host1.empiretelecom.com.br
186.250.36.40	A	ns1.empiretelecom.com.br
186.250.36.50	PTR	host1.empiretelecom.com.br
186.250.36.50	A	empirehost.com.br
186.250.36.50	A	bidbom.com.br
186.250.36.51	PTR	ns2-host1.empirehost.com.br
186.250.36.52	A+PTR	ns3-host1.empirehost.com.br
186.250.36.52	A	ns3-host1.empiretelecom.com.br
186.250.36.53	A+PTR	ns4-host1.empirehost.com.br
186.250.36.53	A	ns4-host1.empiretelecom.com.br
186.250.36.56	A	ns1.empirehost.com.br
186.250.36.57	A	ns2.empirehost.com.br
186.250.36.67	A	angheben.net
186.250.36.104	A	mail.enele.com.br
186.250.36.106	PTR	mail.casadomdf.com.br
186.250.36.107	A+PTR	mail.ghelplus.com.br
186.250.36.107	A	mail.duranox.com.br
186.250.38.2	PTR	router2.empiretelecom.com.br
186.250.38.29	A+PTR	mail.tokefinal.com.br
186.250.39.154	A+PTR	ns2.nutrisul.com.br
186.250.39.154	A	bisbit.com.br
186.250.39.154	A	libardoni.com.br
186.250.39.161	PTR	161-39-250-186.static-fiber.empiretelecom.com.br
186.250.39.161	A	saolourenco.sc.gov.br
186.250.39.163	A	ns1.saolourenco.sc.gov.br
186.250.39.164	PTR	164-39-250-186.static-fiber.empiretelecom.com.br
186.250.39.164	A	ns2.saolourenco.sc.gov.br
186.250.39.194	PTR	194-39-250-186.static-fiber.empirehost.com.br