shell:$ nslookup -timeout=2 -retry=1 'www.smart.com.kh'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
www.smart.com.kh	canonical name = www.smart.com.kh.cdn.cloudflare.net.
Name:	www.smart.com.kh.cdn.cloudflare.net
Address: 104.16.186.81
Name:	www.smart.com.kh.cdn.cloudflare.net
Address: 104.16.196.79
Name:	www.smart.com.kh.cdn.cloudflare.net
Address: 2606:4700::6810:c44f
Name:	www.smart.com.kh.cdn.cloudflare.net
Address: 2606:4700::6810:ba51