shell:$ nslookup -timeout=2 -retry=1 'amer-webhook.teams.live.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
amer-webhook.teams.live.com	canonical name = teams-webhook-amer-tfl.trafficmanager.net.
teams-webhook-amer-tfl.trafficmanager.net	canonical name = tmsg-tfl-whap-uswe2-01-dns.westus2.cloudapp.azure.com.
Name:	tmsg-tfl-whap-uswe2-01-dns.westus2.cloudapp.azure.com
Address: 20.69.171.105