shell:$ nslookup -timeout=2 -retry=1 'fq03.app'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
fq03.app	canonical name = cdn-http-ok.ns.keilao.com.
Name:	cdn-http-ok.ns.keilao.com
Address: 45.78.63.131