shell:$ nslookup -timeout=2 -retry=1 'vn-oc.ruangguru.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
vn-oc.ruangguru.com	canonical name = d1bmcces0j3vlc.cloudfront.net.
Name:	d1bmcces0j3vlc.cloudfront.net
Address: 18.154.185.128
Name:	d1bmcces0j3vlc.cloudfront.net
Address: 18.154.185.47
Name:	d1bmcces0j3vlc.cloudfront.net
Address: 18.154.185.71
Name:	d1bmcces0j3vlc.cloudfront.net
Address: 18.154.185.93
Name:	d1bmcces0j3vlc.cloudfront.net
Address: 2600:9000:2507:bc00:1:34bd:6c00:93a1
Name:	d1bmcces0j3vlc.cloudfront.net
Address: 2600:9000:2507:c00:1:34bd:6c00:93a1
Name:	d1bmcces0j3vlc.cloudfront.net
Address: 2600:9000:2507:0:1:34bd:6c00:93a1
Name:	d1bmcces0j3vlc.cloudfront.net
Address: 2600:9000:2507:d200:1:34bd:6c00:93a1
Name:	d1bmcces0j3vlc.cloudfront.net
Address: 2600:9000:2507:8400:1:34bd:6c00:93a1
Name:	d1bmcces0j3vlc.cloudfront.net
Address: 2600:9000:2507:9a00:1:34bd:6c00:93a1
Name:	d1bmcces0j3vlc.cloudfront.net
Address: 2600:9000:2507:ce00:1:34bd:6c00:93a1
Name:	d1bmcces0j3vlc.cloudfront.net
Address: 2600:9000:2507:8c00:1:34bd:6c00:93a1