shell:$ nslookup -timeout=2 -retry=1 'viber.com.free'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	viber.com.free
Address: 172.67.174.243
Name:	viber.com.free
Address: 104.21.31.42
Name:	viber.com.free
Address: 2606:4700:3033::6815:1f2a
Name:	viber.com.free
Address: 2606:4700:3035::ac43:aef3