Robtex

Up: 138.185.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 138.185.72.0/23
Down right: 138.185.74.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
138.185.72.6	A	ns1.jgvazmontagens.com.br
138.185.72.6	A	imobiliariamanzotti.com.br
138.185.72.6	A	ns1.g21telecom.com.br
138.185.72.10	A	leao.empasoft.com.br
138.185.72.10	A	ns2.jgvazmontagens.com.br
138.185.72.14	A+PTR	mk-auth.empasoft.com.br
138.185.72.14	A	www.empasoft.com.br
138.185.72.26	PTR	138-185-72-26.g21telecom.com.br
138.185.72.26	A	g21telecom.com.br
138.185.73.2	PTR	138-185-73-2.g21telecom.com.br
138.185.73.2	A	bluebull.com.br
138.185.73.2	A	g21host.com.br
138.185.73.3	PTR	138-185-73-3.g21telecom.com.br
138.185.73.3	A	ns2.g21host.com.br
138.185.75.98	PTR	138-72.98.netwtelecom.com.br