Robtex

Up: 66.163.36.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 66.163.36.0/25
Down right: 66.163.36.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.163.36.4	A	sjc02-tcp02-lb01b.webex.com
66.163.36.5	A+PTR	sjc02-tcp02-lb01a.webex.com
66.163.36.11	A+PTR	asj1avc.webex.com
66.163.36.11	A	global-asj1avc.webex.com
66.163.36.14	A+PTR	isj5jft601-s.webexconnect.com
66.163.36.15	A+PTR	asj1avs1.webex.com
66.163.36.16	A	asj1avs2.webex.com
66.163.36.17	A	asj1avs3.webex.com
66.163.36.18	A+PTR	asj1avs4.webex.com
66.163.36.19	A+PTR	asj1avs5.webex.com
66.163.36.20	A	asj1avs6.webex.com
66.163.36.35	PTR	global-login.webexaimpro.com
66.163.36.38	A+PTR	eiwcbmm10.webex.com
66.163.36.39	A+PTR	eiwcbmm20.webex.com
66.163.36.40	A+PTR	global-swapi.webexconnect.com
66.163.36.40	A	swapiwc.webexconnect.com
66.163.36.40	A	swapi.webexconnect.com
66.163.36.41	A	global-pcs.webexconnect.com
66.163.36.42	A	global-jds.webex.com
66.163.36.43	A	global-calendar.webexconnect.com
66.163.36.43	A	calendar.webexconnect.com
66.163.36.44	A+PTR	osj1supt.webexconnect.com
66.163.36.45	A+PTR	osj1dmon.webexconnect.com
66.163.36.48	PTR	www.rpdubai.com
66.163.36.49	A+PTR	isj5jft602-s.webexconnect.com
66.163.36.56	A	loginp.webexconnect.com
66.163.36.56	A	global-cas-c63.webexconnect.com
66.163.36.56	A	cas.webexconnect.com
66.163.36.58	A+PTR	msgr-admin-sj.webexconnect.com
66.163.36.58	A	msgr-admin.webexconnect.com
66.163.36.58	A	global-msgr-admin.webexconnect.com
66.163.36.76	PTR	www.rpdubai.ae
66.163.36.77	PTR	www.dubairealestatecommunity.ae
66.163.36.77	PTR	www.dubairealestatecommunity.com
66.163.36.82	A	sjc02-dms.webexconnect.com
66.163.36.83	A	sjc02-pcs.webexconnect.com
66.163.36.85	A	sjc02-auth.webexconnect.com
66.163.36.86	A+PTR	sjc02-auth.webexaimpro.com
66.163.36.90	A+PTR	sjc02-admin.webexaimpro.com
66.163.36.91	A	sjc02-rauth.webexaimpro.com
66.163.36.97	A	global-isj5cmx-c76.webexconnect.com
66.163.36.103	A+PTR	download.webexconnect.com
66.163.36.104	A+PTR	sjc02-download.webexconnect.com
66.163.36.106	A+PTR	sjc02-cs.webexconnect.com
66.163.36.110	PTR	collaborationcenter.webexconnect.com
66.163.36.111	A+PTR	searchdms.webex.com
66.163.36.113	A	global-im6-c76.ciscowebex.com
66.163.36.118	A	x02dms.webexconnect.com
66.163.36.118	A	dms-c63.webexconnect.com
66.163.36.118	A	dms.webexconnect.com
66.163.36.120	A	global-isj7cmx-c76.webexconnect.com
66.163.36.120	A	isj7cmx.webexconnect.com
66.163.36.125	A	global-push.webexconnect.com
66.163.36.133	A	nebula-download-test1.webex.com
66.163.36.139	A	x02wapi.webexconnect.com
66.163.36.139	A	global-x02swapi.webexconnect.com
66.163.36.141	A+PTR	art-dms-ar.webexconnect.com
66.163.36.142	A	art-dmssearch-ar.webexconnect.com
66.163.36.169	A	download.webex.com
66.163.36.169	A	marketplace.webex.com
66.163.36.181	A	global-isj3cmx-c76.webexconnect.com
66.163.36.181	A	isj3cmx.webexconnect.com
66.163.36.186	A	global-isj3jxf-c76.webexconnect.com
66.163.36.186	A	isj3jxf.webexconnect.com
66.163.36.190	A	isj3jft601-s.webexconnect.com
66.163.36.191	A	isj3jft602-s.webexconnect.com
66.163.36.192	A	global-im3-c76.ciscowebex.com
66.163.36.194	A	global-isj1cmx-c76.webexconnect.com
66.163.36.194	A	c2s.sj1.webex.com
66.163.36.197	A	isj1cmx-gw-s.webexconnect.com
66.163.36.199	A	global-isj1jxf-c76.webexconnect.com
66.163.36.200	A+PTR	isj1jxf-s.webexconnect.com
66.163.36.202	A+PTR	isj1jws-s.webexconnect.com
66.163.36.203	A+PTR	isj1jft601-s.webexconnect.com
66.163.36.204	A	isj1jft602-s.webexconnect.com
66.163.36.205	A	global-im1-c76.ciscowebex.com
66.163.36.205	A	im1.ciscowebex.com
66.163.36.205	A	im.ciscowebex.com
66.163.36.207	A	c2s.sj4.webex.com
66.163.36.207	A	c2s.vfc.com.webexconnect.com
66.163.36.207	A	global-isj4cmx-c76.webexconnect.com
66.163.36.216	A	isj4jft601-s.webexconnect.com
66.163.36.217	A	isj4jft602-s.webexconnect.com
66.163.36.220	A	global-isj2cmx-c76.webexconnect.com
66.163.36.220	A	isj2cmx.webexconnect.com
66.163.36.231	A	global-im2-c76.ciscowebex.com
66.163.36.236	A	global-x03swapi.webexconnect.com
66.163.36.236	A	x03swapi.webexconnect.com