Robtex

Up: 66.163.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 66.163.40.0/22
Down right: 66.163.44.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.163.40.26	A	racsjrera1.webex.com
66.163.40.27	A	racsjrera2.webex.com
66.163.40.28	A	racsjrera1-bmc.webex.com
66.163.40.29	A	racsjrera2-bmc.webex.com
66.163.40.126	A	racsjrera1-vip.webex.com
66.163.40.127	A	racsjrera2-vip.webex.com
66.163.41.166	A	iad02-con01.webex.com
66.163.41.166	A	iad02-con01-ge0-1.webex.com
66.163.42.4	A+PTR	sjc02-wxp-lbsdx01-v817-ha.webex.com
66.163.42.4	A+PTR	sjc02-wxbt-lbsdx01-jbr-adns.webex.com
66.163.42.19	A+PTR	identitybts-test.webex.com
66.163.42.20	A+PTR	calendarsda2.webexconnect.com
66.163.42.24	A	dmssda2.webexconnect.com
66.163.42.25	A	pcssda.webexconnect.com
66.163.42.27	A	cometdsda2.webexconnect.com
66.163.42.28	A	sjc02-ibt1cmx-new.webexconnect.com
66.163.42.35	A	global-ibt2jxf-c76.webexconnect.com
66.163.42.35	A	ibt2jxf.webexconnect.com
66.163.42.36	A	global-ibt2cmx-gw-c76.webexconnect.com
66.163.42.39	A	global-ibt2cmx-c76.webexconnect.com
66.163.42.41	A+PTR	botsda2.webexconnect.com
66.163.42.47	A	ibt1jft201-s.webexconnect.com
66.163.42.48	A	ibt1jft202-s.webexconnect.com
66.163.42.49	A	ibt2jft201-s.webexconnect.com
66.163.42.50	A+PTR	ibt2jft202-s.webexconnect.com
66.163.42.53	PTR	gpsbts-sjc02.webex.com
66.163.42.53	A	global-gpsbts.webex.com
66.163.42.57	A	ciscowebex.com
66.163.42.64	A	gasa1wapi-dms.webexconnect.com
66.163.42.66	A	gasa1aux.webexconnect.com
66.163.42.67	A	gasa1bot.webexconnect.com
66.163.42.68	A	gasa1cal.webexconnect.com
66.163.42.72	A	global-dmsbts-c63.webexconnect.com
66.163.42.86	A+PTR	aim-proxy.webexbts.com
66.163.42.98	A	bt8wwp.webex.com
66.163.42.99	A	ebt8cbmm10.webex.com
66.163.42.100	A+PTR	ebt8cbmm20.webex.com
66.163.42.101	A	downloadbts.webexconnect.com
66.163.42.118	A+PTR	noctest.webex.com
66.163.42.125	A	demowebex.com
66.163.42.133	A+PTR	artemis-dms-gsb-float-sda.webexconnect.com
66.163.42.134	A+PTR	artemis-dmssearchgsb-float-sda.webexconnect.com
66.163.42.137	A	artemis-dms-pri-float-sda.webexconnect.com
66.163.42.138	A	artemis-dmssearchpri-float-sda.webexconnect.com
66.163.42.140	A	vbt1gla-float.webex.com
66.163.42.141	PTR	artbts-dms.webexconnect.com
66.163.42.197	A	global-cas-bts2-new.webexconnect.com
66.163.42.200	A+PTR	servicestatusbts_gsb.webex.com
66.163.42.200	A+PTR	akamaiservicestatus-test.webex.com
66.163.42.200	A+PTR	servicestatusbts-pri.webex.com
66.163.42.201	PTR	api-bts-sjc02.webex.com
66.163.42.201	A	global-api-bts.webex.com
66.163.42.219	A	notifications-betasj.webex.com
66.163.42.230	A+PTR	bmmpbts-sjc02.webex.com
66.163.42.230	A	global-bmmpbts.webex.com
66.163.42.240	A	global-s3-us-sgcloud.webex.com
66.163.42.240	A	sjc-s3-sgcloud.webex.com
66.163.43.11	A+PTR	abt1bot201.webex.com
66.163.43.12	A	abt1bot202.webex.com
66.163.43.13	A	abt1bot203.webex.com
66.163.43.14	A+PTR	abt1bot204.webex.com
66.163.43.16	A+PTR	abt1das202.webex.com
66.163.43.17	PTR	y90sjnps001.webex.com
66.163.43.17	A	abt1ngs201.webex.com
66.163.43.21	A+PTR	ebt2cb94.webex.com
66.163.43.22	A	ebt2cb9402.webex.com
66.163.43.28	A+PTR	ebt2cb9102.webex.com
66.163.43.39	A	abts1bot001.webex.com
66.163.43.79	A	gvmsa1esx019.webex.com
66.163.43.80	A	gvmsa1esx020.webex.com
66.163.43.85	A	in90sjpbs001.webex.com
66.163.43.86	A	in90sjpbs002.webex.com
66.163.43.87	A	in90sjpbs003.webex.com
66.163.43.90	A	abts1bot002.webex.com
66.163.43.95	A	bt8wwp1.webex.com
66.163.43.96	A+PTR	bt8wwp2.webex.com
66.163.43.97	A	ebt8cbmm11.webex.com
66.163.43.98	A	ebt8cb1101.webex.com
66.163.43.99	A+PTR	ebt8cb1102.webex.com
66.163.43.104	A	ebt8cb2101.webex.com
66.163.43.105	A	ebt8cb2102.webex.com
66.163.43.106	PTR	mbts2mcs111.webex.com
66.163.43.106	A	ebt8cbmm22.webex.com
66.163.43.107	A	ebt8cb2201.webex.com
66.163.43.113	A+PTR	vmsa1esx010.webex.com
66.163.43.249	A	vmbt1esx010.webex.com
66.163.44.20	A	seachfarm-sda.webexsda.com
66.163.44.32	A	eurekapqa4.webex.com
66.163.44.41	A	galaxypqagsb.webex.com
66.163.44.42	A	galaxypqagsb-wl.webex.com
66.163.44.43	A+PTR	galaxypqa4.webex.com
66.163.44.44	A	galaxypqa4-wl.webex.com
66.163.44.132	A+PTR	sjc02-wxpqa-lb01a.webex.com
66.163.44.133	A	sjc02-wxpqa-lb01a-mip.webex.com
66.163.45.225	A	gvmsa1esx023.webex.com
66.163.45.248	A	gvmsa1esx021.webex.com
66.163.45.249	A	gvmsa1esx022.webex.com
66.163.46.16	PTR	nto1mss001.webex.com
66.163.46.16	A	global-pp0100iri001.ciscomail.com
66.163.46.16	A	smtpi.ciscomail.com
66.163.46.22	PTR	eaocb14.webex.com
66.163.46.26	A+PTR	eaocb16.webex.com
66.163.46.27	A+PTR	eaocb1602.webex.com
66.163.46.28	A+PTR	eaocb23.webex.com
66.163.46.30	A+PTR	eaocb24.webex.com
66.163.46.32	A+PTR	eaocb25.webex.com
66.163.46.32	A	eaocb2501.webex.com
66.163.46.35	A+PTR	eaocb2602.webex.com
66.163.47.11	A+PTR	yyz01-nto1msccl01.webex.com
66.163.47.11	A	global-nto1msccl01.webex.com
66.163.47.21	A	gts-ee-fr.webex.com
66.163.47.21	A	canadapost.webex.com
66.163.47.21	A	nebulaao.webex.com
66.163.47.26	A+PTR	eaocbmm10.webex.com
66.163.47.31	A	mto1mcccl01.webex.com
66.163.47.31	A	global-mto1mcccl01.webex.com
66.163.47.34	A	mto1mcs101-ms-vip.webex.com
66.163.47.38	A+PTR	mto1mcs103-ms-vip.webex.com
66.163.47.40	A+PTR	api-yyz01.webex.com
66.163.47.40	A	global-api.webex.com
66.163.47.100	A+PTR	mls-prod-yyz01.webex.com
66.163.47.100	A	global-mls-prod.webex.com
66.163.47.123	A+PTR	yyz01-wxpd-lb01-adns.webex.com