shell:$ nslookup -timeout=2 -retry=1 'app.viptalk.org'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
Name:	app.viptalk.org
Address: 172.64.150.173
Name:	app.viptalk.org
Address: 104.18.37.83
Name:	app.viptalk.org
Address: 2606:4700:4409::ac40:96ad
Name:	app.viptalk.org
Address: 2a06:98c1:3109::6812:2553