Robtex

Up: 191.243.192.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 191.243.192.0/24
Down right: 191.243.193.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
191.243.192.0	PTR	191-243-192-0.nagelnet.com.br
191.243.192.6	A+PTR	email.nagelnet.com.br
191.243.192.10	PTR	191-243-192-10.nagelnet.com.br
191.243.192.10	A	nagelnet.com.br
191.243.192.10	A	ns1.nagelnet.com.br
191.243.192.11	PTR	191-243-192-11.nagelnet.com.br
191.243.192.11	A	ns2.nagelnet.com.br