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

Non-authoritative answer:
classroom.cakap.com	canonical name = gw.cakap.com.
gw.cakap.com	canonical name = a1b4011f1b8d8419da85321dbd442e55-69286acea9bb66d7.elb.ap-southeast-3.amazonaws.com.
Name:	a1b4011f1b8d8419da85321dbd442e55-69286acea9bb66d7.elb.ap-southeast-3.amazonaws.com
Address: 43.218.28.130
Name:	a1b4011f1b8d8419da85321dbd442e55-69286acea9bb66d7.elb.ap-southeast-3.amazonaws.com
Address: 108.136.86.18