Robtex

Up: 173.38.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 173.38.128.0/18
Down right: 173.38.192.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.38.133.8	A	lys01-acns-ce1.cisco.com
173.38.154.4	A+PTR	cc-reports.cisco.com
173.38.154.6	A	expe1-2.gpk.ciscolabs.com
173.38.154.40	A+PTR	techzone2018.cisco.com
173.38.154.43	A+PTR	toyshop.cisco.com
173.38.154.157	A	map46.cisco.com
173.38.154.157	A	6lab.cisco.com
173.38.154.157	A	6lab-stats.com
173.38.154.161	PTR	ra-lpwa.cisco.com
173.38.155.12	A	mail.altherr.info
173.38.168.130	PTR	tcecdmz-bdlk-vcs1.cisco.com
173.38.168.130	A	ebc.cisco.com
173.38.168.131	PTR	bdlkdmz-vcse2.ebc.cisco.com
173.38.168.167	A+PTR	gmt-dvor-vcse1.cisco.com
173.38.168.167	A	pajoin.cisco.com
173.38.168.170	A	eft.cisco.com
173.38.168.171	A	eft.cisco.com
173.38.197.20	A	aer01-r4c25-dcm01n-gss1.cisco.com
173.38.200.87	A+PTR	esl-aer1-1-l.cisco.com
173.38.200.100	A+PTR	dns-aer1.cisco.com
173.38.200.100	A	shampoo.fr
173.38.200.154	A+PTR	adc-aer1-c1-6.cisco.com
173.38.200.155	A+PTR	adc-aer1-c1-1.cisco.com
173.38.200.156	A+PTR	adc-aer1-c1-2.cisco.com
173.38.200.158	A+PTR	adc-aer1-c1-8.cisco.com
173.38.202.102	A+PTR	dsx-aer1-c-1-w.cisco.com
173.38.202.104	A+PTR	dsx-aer1.cisco.com
173.38.202.106	A+PTR	dsx-oam-aer1.cisco.com
173.38.202.219	A+PTR	msr-em402-ams.cisco.com
173.38.203.6	A+PTR	aer-core-1.cisco.com
173.38.203.52	A+PTR	aer-iport-2.cisco.com
173.38.203.53	A	aer-iport-3.cisco.com
173.38.208.5	A+PTR	aer01-mda1-isp-gw1-ten0-0-0.cisco.com
173.38.208.169	A+PTR	173-38-208-169.cisco.com
173.38.209.7	A+PTR	aer01-mda1-dmz-wsa-2.cisco.com
173.38.209.9	A+PTR	aer01-mda2-dmz-wsa-4.cisco.com
173.38.209.11	A	aer01-mda1-dmz-wsa-6.cisco.com
173.38.209.11	A	aer01-mda2-dmz-wsa-6.cisco.com
173.38.210.17	A+PTR	gmt-aedge2.cisco.com
173.38.210.18	A+PTR	gmt-aturn.cisco.com
173.38.210.21	A+PTR	amsda-vcse1.cisco.com
173.38.210.21	A	gmt-ea1c.cisco.com
173.38.210.22	PTR	amsda-vcse2.cisco.com
173.38.210.22	A	gmt-ea1c.cisco.com
173.38.210.23	A	gmt-ea1c.cisco.com
173.38.212.11	A+PTR	www-pdmprd-ams4.cisco.com
173.38.212.48	A+PTR	concsoweb3-prd.cisco.com
173.38.212.73	PTR	vce-aer-103.cisco.com
173.38.212.77	A+PTR	vce-aer-201.cisco.com
173.38.212.77	A	vce-aer-2.cisco.com
173.38.212.78	A	vce-aer-2.cisco.com
173.38.212.150	A+PTR	aer-mx-01.cisco.com
173.38.213.70	A+PTR	aer01-ucs-dcz01n-gslb1-snip.cisco.com
173.38.213.89	A+PTR	ciscoshare-aer.cisco.com
173.38.214.22	A+PTR	telitalia-ipe-bci-emear.cisco.com
173.38.214.22	A	bci-emear-cp3.cisco.com
173.38.214.254	A+PTR	bci-emear-cp2.cisco.com
173.38.218.9	A+PTR	dcloud-lon-anyconnect.cisco.com
173.38.218.10	A+PTR	dcloud-lon-web-1.cisco.com
173.38.218.25	A+PTR	dcloud2-lon-connect-1.cisco.com
173.38.218.25	A	dcloud-lon-connect.cisco.com
173.38.219.103	A+PTR	ccie-dmz-gw4.cisco.com
173.38.219.132	A	ns1.dc-07.com
173.38.219.133	A	ns2.dc-07.com
173.38.219.138	A	xs.cisco.com
173.38.219.161	A+PTR	dcloud2-stg-web-1.cisco.com
173.38.219.174	PTR	dcloud2-uat-connect-1.cisco.com
173.38.220.36	A	cscoacme.com
173.38.221.7	A+PTR	yangcatalog.cisco.com
173.38.221.19	A+PTR	6lab-origin.cisco.com
173.38.221.60	A	ns0.openroaming.org
173.38.221.60	A	ns1.openroaming.org
173.38.222.35	A	rnax.net
173.38.222.255	A	cms-dcloud.com
173.38.244.202	A	www-tac.cisco.com