Robtex

Up: 23.29.104.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 23.29.104.0/24
Down right: 23.29.105.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
23.29.105.10	A+PTR	supportqa.citrix.com
23.29.105.12	A	receiverupdatecheckruc.citrix.com
23.29.105.12	A	prod-receiverupdatechecksec.citrix.com
23.29.105.13	A	itdevzdm.citrix.com
23.29.105.15	PTR	xm.citrix.com
23.29.105.22	A+PTR	discussions.citrix.com
23.29.105.26	PTR	chatproxy.citrix.com
23.29.105.26	A	sipt.citrix.com
23.29.105.28	A+PTR	av.citrix.com
23.29.105.30	A+PTR	vip2.citrix.com
23.29.105.31	A+PTR	entityservices.citrix.com
23.29.105.32	A	taskservices.citrix.com
23.29.105.33	A	utilityservices.citrix.com
23.29.105.36	A	rsa.citrix.com
23.29.105.37	PTR	engxdftl.citrix.com
23.29.105.42	A+PTR	ftlxcent.citrix.com
23.29.105.45	A+PTR	accelerator.citrix.com
23.29.105.45	PTR	project.citrix.com
23.29.105.45	A+PTR	projects.citrix.com
23.29.105.47	A	preprodextmc.citrix.com
23.29.105.50	A+PTR	qaftlagee.citrix.com
23.29.105.52	A+PTR	qaftlgo.citrix.com
23.29.105.52	A	go.citrix.com
23.29.105.52	A	ftlgo.citrix.com
23.29.105.53	A+PTR	ftlagee1.citrix.com
23.29.105.54	A	welcome.citrix.com
23.29.105.67	A	engxdftl.citrix.com
23.29.105.79	A+PTR	ftpqa.citrix.com
23.29.105.83	A	lyncaccess.citrix.com
23.29.105.83	A	chatproxy.citrix.com
23.29.105.106	A	lyncaccess.citrix.com
23.29.105.106	A	chatproxy.citrix.com
23.29.105.106	A	ftllyncaccess.citrix.com
23.29.105.113	A+PTR	mail.citrix.com
23.29.105.113	A+PTR	autodiscover.eu.citrix.com
23.29.105.113	PTR	ftlmail.citrix.com
23.29.105.133	A+PTR	citrixservicesha.citrix.com
23.29.105.154	A+PTR	ftlgoqa.citrix.com
23.29.105.160	A	athena.citrix.com
23.29.105.165	A	ftllyncaccess.citrix.com
23.29.105.173	A+PTR	ftlmsol.testcitrix.com
23.29.105.197	A	lynx.citrix.com
23.29.105.232	A	ping.citrix.com
23.29.105.236	A	phoenix.citrix.com
23.29.105.237	A	discussions.citrix.com