Robtex

Up: 74.123.112.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 74.123.112.0/23
Down right: 74.123.114.0/23

IP	Type	Hostname
74.123.112.5	A	ns1.genoptix.com
74.123.112.5	A	ns1.genoptix.org
74.123.112.6	A	ns2.genoptix.com
74.123.112.7	A+PTR	ns3.genoptix.net
74.123.112.8	A	ns4.genoptix.net
74.123.112.10	A+PTR	vpm01.genoptix.com
74.123.112.14	A	genoptix.biz
74.123.112.17	A+PTR	ecompass.genoptix.com
74.123.112.17	A+PTR	go.genoptix.com
74.123.112.24	A+PTR	test.genoptix.com
74.123.112.37	A	media.genoptix.com
74.123.112.52	A+PTR	lxmedia.genoptix.com
74.123.112.54	A	genotrace.com
74.123.112.60	A+PTR	beyondthereport.com
74.123.112.60	A+PTR	www.beyondthereport.com
74.123.112.140	A+PTR	iportal2.genoptix.com