Robtex

Up: 192.149.28.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.149.28.0/25
Down right: 192.149.28.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.149.28.214	A+PTR	ns-00.crucialsecurity.com
192.149.28.214	A+PTR	ns-00.crucialsecurity.net
192.149.28.214	A+PTR	ns-00.crucialsecurity.org
192.149.28.215	A+PTR	ns-01.crucialsecurity.com
192.149.28.215	A+PTR	ns-01.crucialsecurity.net
192.149.28.215	A+PTR	ns-01.crucialsecurity.org
192.149.28.216	A+PTR	mx-00.crucialsecurity.com
192.149.28.216	A+PTR	mx-rr.crucialsecurity.com
192.149.28.216	A+PTR	mx-00.crucialsecurity.net
192.149.28.217	A+PTR	mx-01.crucialsecurity.com
192.149.28.217	A+PTR	mx-rr.crucialsecurity.com
192.149.28.217	A+PTR	mx-01.crucialsecurity.net
192.149.28.218	A+PTR	www-00.crucialsecurity.com
192.149.28.218	PTR	www.crucialsecurity.com
192.149.28.218	PTR	www-00.crucialsecurity.net
192.149.28.220	A+PTR	ea.crucialsecurity.com
192.149.28.220	A+PTR	ea.crucialsecurity.net
192.149.28.220	A+PTR	ea.crucialsecurity.org