shell:$ nslookup -timeout=2 -retry=1 'apphub.webex.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
apphub.webex.com	canonical name = apphub.wbx2.com.
apphub.wbx2.com	canonical name = app-hub-r.wbx2.com.
app-hub-r.wbx2.com	canonical name = prod-aore-general1.wbx2.com.
prod-aore-general1.wbx2.com	canonical name = wxt-general-ingressgateway-ds.wxtgen-prod-aore-general1.b80.prod.infra.webex.com.
Name:	wxt-general-ingressgateway-ds.wxtgen-prod-aore-general1.b80.prod.infra.webex.com
Address: 170.72.250.146
Name:	wxt-general-ingressgateway-ds.wxtgen-prod-aore-general1.b80.prod.infra.webex.com
Address: 170.72.250.98
Name:	wxt-general-ingressgateway-ds.wxtgen-prod-aore-general1.b80.prod.infra.webex.com
Address: 170.72.250.34
Name:	wxt-general-ingressgateway-ds.wxtgen-prod-aore-general1.b80.prod.infra.webex.com
Address: 2607:fcf0:20a4:802:541d:fef1:25a:a66d
Name:	wxt-general-ingressgateway-ds.wxtgen-prod-aore-general1.b80.prod.infra.webex.com
Address: 2607:fcf0:20a4:801:879f:d5d3:3e33:c899
Name:	wxt-general-ingressgateway-ds.wxtgen-prod-aore-general1.b80.prod.infra.webex.com
Address: 2607:fcf0:20a4:800:fb4:94b2:9151:e89b