shell:$ nslookup -timeout=2 -retry=1 'ruangkelas.id'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	ruangkelas.id
Address: 104.21.9.241
Name:	ruangkelas.id
Address: 172.67.131.20
Name:	ruangkelas.id
Address: 2606:4700:3031::ac43:8314
Name:	ruangkelas.id
Address: 2606:4700:3037::6815:9f1