shell:$ nslookup -timeout=2 -retry=1 'apphub.webex.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
apphub.webex.com	canonical name = apphub.wbx2.com.
apphub.wbx2.com	canonical name = app-hub-a.wbx2.com.
app-hub-a.wbx2.com	canonical name = prod-achm-general1.wbx2.com.
prod-achm-general1.wbx2.com	canonical name = wxt-general-ingressgateway-ds.wxtgen-prod-achm-general1.prod.infra.webex.com.
Name:	wxt-general-ingressgateway-ds.wxtgen-prod-achm-general1.prod.infra.webex.com
Address: 170.72.245.206
Name:	wxt-general-ingressgateway-ds.wxtgen-prod-achm-general1.prod.infra.webex.com
Address: 170.72.245.46
Name:	wxt-general-ingressgateway-ds.wxtgen-prod-achm-general1.prod.infra.webex.com
Address: 170.72.245.81
Name:	wxt-general-ingressgateway-ds.wxtgen-prod-achm-general1.prod.infra.webex.com
Address: 2607:fcf0:20a9:101:e233:6fac:4fd2:f108
Name:	wxt-general-ingressgateway-ds.wxtgen-prod-achm-general1.prod.infra.webex.com
Address: 2607:fcf0:20a9:100:98ed:806b:5fc4:de25
Name:	wxt-general-ingressgateway-ds.wxtgen-prod-achm-general1.prod.infra.webex.com
Address: 2607:fcf0:20a9:102:a3e6:2f3a:3882:bcb6