Robtex

Up: 66.28.104.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.28.108.0/23
Down right: 66.28.110.0/23

IP	Type	Hostname
66.28.108.1	PTR	e0.astbb.net
66.28.108.3	A+PTR	discover.astbb.net
66.28.108.5	PTR	ns2.astbb.net
66.28.108.5	A	mail.astbb.net
66.28.108.6	PTR	ns1.astbb.net
66.28.108.116	PTR	mail2.ictcollege.edu
66.28.108.222	PTR	mail.pacifictrustgroup.com
66.28.111.203	A	mail.mtdi.biz