Robtex

Up: 143.112.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 143.112.68.0/23
Down right: 143.112.70.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
143.112.68.4	A+PTR	cae.mckesson.com
143.112.68.13	A+PTR	mail4.mckesson.com
143.112.68.13	A	mail4.axiscenteronline.com
143.112.68.14	A+PTR	mail5.mckesson.com
143.112.68.14	A	mail5.axiscenteronline.com
143.112.68.15	PTR	mail6.mckesson.com
143.112.68.19	A+PTR	practicefocus.mckesson.com
143.112.68.19	A+PTR	practicefocusr3.mckesson.com
143.112.68.31	A+PTR	pcehrsandbox.mckesson.com
143.112.68.36	A	emedcon.com
143.112.68.39	A	ops.awarix.com
143.112.68.40	A+PTR	teservicekc.mckesson.com
143.112.68.49	A+PTR	eservicekc.mckesson.com
143.112.68.50	A	www.med3000.com
143.112.68.50	A	mckessonpracticesolutions.com
143.112.68.50	A	medisoft.com
143.112.68.57	A	practicefocus-uat.mckesson.com
143.112.68.62	A	ppsmobile.mckesson.com
143.112.68.63	A	www.sendclaim.com
143.112.68.63	A	sendclaim.com
143.112.68.66	A+PTR	cespa.mckesson.com
143.112.68.67	A	ces.mckesson.com
143.112.68.71	PTR	rmsconnect.mckesson.com
143.112.68.72	A+PTR	testces.mckesson.com
143.112.68.74	A	testcespp.mckesson.com
143.112.68.78	A+PTR	b2bftp.supplysource.mckesson.com
143.112.68.79	A	bpspsm.mckesson.com
143.112.68.82	A	myeshifts.com
143.112.68.82	A	www.myeshifts.com
143.112.68.82	A	loadtest.myeshifts.com
143.112.68.85	A+PTR	base.myonestaff.com
143.112.68.85	A	emorytestwsm.myonestaff.com
143.112.68.85	A	stalexiustestawm.myonestaff.com
143.112.68.157	A+PTR	east-gslb-ext.mckesson.com
143.112.68.183	A	adfs2.gslb2.usoncology.com
143.112.68.248	A+PTR	taniumdmz.mckesson.com