Robtex

Up: 168.228.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 168.228.216.0/23
Down right: 168.228.218.0/23

IP	Type	Hostname
168.228.216.2	A+PTR	ns1.tecnet.net.br
168.228.216.2	A	tecnetanapolis.com.br
168.228.216.2	A	mail.tecnetanapolis.com.br
168.228.216.3	A+PTR	ns2.tecnet.net.br
168.228.216.238	A+PTR	ns2.tecnet.net.br
168.228.216.238	A	dns2.tecnet.net.br
168.228.216.242	A+PTR	ns1.tecnet.net.br
168.228.216.242	A	dns1.tecnet.net.br
168.228.217.4	A+PTR	168-228-217-4-emp.tecnet.net.br
168.228.217.42	PTR	168-228-217-42-emp.tecnet.net.br
168.228.217.42	A	novastribos.org
168.228.217.43	A+PTR	168-228-217-43-emp.tecnet.net.br
168.228.217.43	A	mntb.org.br
168.228.217.43	A	www.mntb.org.br
168.228.217.100	PTR	168-228-217-100-emp.tecnet.net.br
168.228.217.115	A+PTR	168-228-217-115-emp.tecnet.net.br
168.228.219.50	A+PTR	168-228-219-50-res.tecnet.net.br