shell:$ nslookup -timeout=2 -retry=1 'speedtest.smart.com.kh'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	speedtest.smart.com.kh
Address: 27.109.112.21
Name:	speedtest.smart.com.kh
Address: 2401:9700:3000::4