Robtex

Up: 208.67.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 208.67.220.0/23
Down right: 208.67.222.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.67.220.123	PTR	resolver2-fs.opendns.com
208.67.220.123	A	qarxx4cl3.com
208.67.220.123	A	qerxx4cl3.com
208.67.220.220	PTR	resolver2.opendns.com
208.67.220.220	PTR	dns.umbrella.com
208.67.220.220	PTR	dns.opendns.com
208.67.220.222	PTR	resolver4.opendns.com
208.67.222.123	A+PTR	resolver1-fs.opendns.com
208.67.222.123	A+PTR	familyshield.opendns.com
208.67.222.123	A	fey4lmmsu.com
208.67.222.220	A+PTR	resolver3.opendns.com
208.67.222.220	A	fbbgsolutions.com
208.67.222.220	A	ratata.ru
208.67.222.222	PTR	resolver1.opendns.com
208.67.222.222	PTR	dns.umbrella.com
208.67.222.222	PTR	dns.opendns.com