Robtex

Up: 66.163.46.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 66.163.47.0/25
Down right: 66.163.47.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
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