shell:$ nslookup -timeout=2 -retry=1 'smartedu.com.kh'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
Name:	smartedu.com.kh
Address: 104.18.25.210
Name:	smartedu.com.kh
Address: 104.18.24.210