Robtex

Up: 173.199.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 173.199.4.0/23
Down right: 173.199.6.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.199.4.15	A	builds.citrixonlinecdn.com
173.199.4.16	A	logging.citrixonline.com
173.199.4.19	A	mobile.p5.osdimg.com
173.199.4.19	A	ats.osdimg.com
173.199.4.19	A	l1.osdimg.com
173.199.4.25	A	push.citrixonline.com
173.199.4.27	A	authentication.citrixonline.com
173.199.4.27	A	authentication.iad.expertcity.com
173.199.4.34	PTR	joingototraining.com
173.199.4.34	PTR	gotoassist.de
173.199.4.34	PTR	gotomeeting.de
173.199.4.36	A	bbuilds.getgocdn.com
173.199.4.44	PTR	buildscdn-iad.getgocdn.com
173.199.4.44	A	builds.getgocdn.com
173.199.4.47	A	authentication.logmeininc.com
173.199.4.53	A+PTR	marketing.logmeininc.com
173.199.4.64	A+PTR	api.openvoice.com
173.199.4.65	A+PTR	hidefcorporate.com
173.199.4.65	A	global.openvoice.com
173.199.4.70	A	logging.getgo.com
173.199.4.71	A	availability.getgo.com
173.199.5.10	A	sharefilesupport.com
173.199.5.10	A	citrixdata.com
173.199.5.10	A	shr.to
173.199.5.15	A	quandrantrea.securevdr.com
173.199.5.15	A	sherwoodpartners.securevdr.com
173.199.5.15	A	regionalmissouri.securevdr.com
173.199.5.16	A	atosfilesend.sharefile.com
173.199.5.16	A	hellotierney.sharefile.com
173.199.5.16	A	kelleyprojectportal.com
173.199.5.17	PTR	www.workspaces.com.pt
173.199.5.20	A	documentdrive.com
173.199.5.21	A	secure.sf-api.com
173.199.5.21	A	deloitteus.sf-api.com
173.199.5.22	PTR	gotoshare.com
173.199.5.22	A	www.gotoshare.com
173.199.5.23	PTR	gotofiles.com
173.199.5.24	A	g.sharefile.com
173.199.5.25	A	bytesquared.com
173.199.5.38	A	travelers.citrixdata.com
173.199.5.41	A	sharefilecpa.com
173.199.5.70	A+PTR	mx-las1.sf-notifications.com
173.199.5.71	A+PTR	mx-las2.sf-notifications.com
173.199.5.72	A+PTR	mx-las3.sf-notifications.com
173.199.5.73	A	mx-las4.sf-notifications.com
173.199.5.74	A+PTR	mx-las5.sf-notifications.com
173.199.5.75	A	mx-las6.sf-notifications.com
173.199.5.90	A	mx-las-util1.sf-notifications.com
173.199.5.91	A	mx-las-util2.sf-notifications.com
173.199.5.92	A	mx-las-util3.sf-notifications.com
173.199.5.93	A	mx-las-util4.sf-notifications.com
173.199.5.141	A+PTR	mx-iad-util1.sf-notifications.com
173.199.5.142	A+PTR	mx-iad-util2.sf-notifications.com
173.199.5.142	A	sfutil2iad.sharefile.com
173.199.5.143	A+PTR	mx-iad-util3.sf-notifications.com
173.199.5.144	A	mx-iad-util4.sf-notifications.com
173.199.5.151	A+PTR	mx-iad1.sf-notifications.com
173.199.5.152	A+PTR	mx-iad2.sf-notifications.com
173.199.5.153	A+PTR	mx-iad3.sf-notifications.com
173.199.5.154	A+PTR	mx-iad4.sf-notifications.com
173.199.5.155	A+PTR	mx-iad5.sf-notifications.com
173.199.5.156	A+PTR	mx-iad6.sf-notifications.com
173.199.6.10	PTR	storage.citrixonline.com
173.199.6.11	PTR	athena.citrixonline.com
173.199.6.12	A	l1.osdimg.com
173.199.6.13	A	builds.citrixonlinecdn.com
173.199.6.21	PTR	blog.citrixonline.com
173.199.6.21	PTR	docs.citrixonline.com
173.199.6.21	A+PTR	news.citrixonline.com
173.199.6.24	A	poll.shareconnect.com
173.199.6.26	A	worxdesktop.com