shell:$ nslookup -timeout=2 -retry=1 'premium-ctb.sing-box.id'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	premium-ctb.sing-box.id
Address: 104.21.32.85
Name:	premium-ctb.sing-box.id
Address: 172.67.185.54
Name:	premium-ctb.sing-box.id
Address: 2606:4700:3037::6815:2055
Name:	premium-ctb.sing-box.id
Address: 2606:4700:3037::ac43:b936