Robtex

Up: 216.230.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.230.72.0/23
Down right: 216.230.74.0/23

IP	Type	Hostname
216.230.72.74	A	pangea.cypresscom.net
216.230.72.74	A	joiner.cypresscom.net
216.230.72.74	A	joiner2.cypresscom.net
216.230.73.9	PTR	216-230-73-9.client.cypresscom.net
216.230.73.68	PTR	68.73.230.216.in-addr.arpa
216.230.73.93	PTR	93.73.230.216.in-addr.arpa
216.230.73.245	PTR	245.73.230.216.in-addr.arpa
216.230.74.10	PTR	10.74.230.216.in-addr.arpa
216.230.74.40	PTR	40.74.230.216.in-addr.arpa
216.230.74.185	PTR	185.74.230.216.in-addr.arpa
216.230.74.229	PTR	229.74.230.216.in-addr.arpa
216.230.74.243	PTR	243.74.230.216.in-addr.arpa
216.230.75.49	PTR	49.75.230.216.in-addr.arpa
216.230.75.70	PTR	70.75.230.216.in-addr.arpa
216.230.75.102	PTR	102.75.230.216.in-addr.arpa
216.230.75.232	PTR	232.75.230.216.in-addr.arpa
216.230.75.255	PTR	216-230-75-255.client.cypresscom.net