shell:$ nslookup -timeout=2 -retry=1 'vpn.trex-official.ink'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	vpn.trex-official.ink
Address: 172.67.139.153
Name:	vpn.trex-official.ink
Address: 104.21.62.219
Name:	vpn.trex-official.ink
Address: 2606:4700:3031::6815:3edb
Name:	vpn.trex-official.ink
Address: 2606:4700:3033::ac43:8b99