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

Non-authoritative answer:
download.viber.com	canonical name = d12imtgdm17m6s.cloudfront.net.
Name:	d12imtgdm17m6s.cloudfront.net
Address: 108.156.172.51
Name:	d12imtgdm17m6s.cloudfront.net
Address: 108.156.172.12
Name:	d12imtgdm17m6s.cloudfront.net
Address: 108.156.172.81
Name:	d12imtgdm17m6s.cloudfront.net
Address: 108.156.172.48
Name:	d12imtgdm17m6s.cloudfront.net
Address: 2600:9000:24f7:5c00:6:57d:4500:93a1
Name:	d12imtgdm17m6s.cloudfront.net
Address: 2600:9000:24f7:b800:6:57d:4500:93a1
Name:	d12imtgdm17m6s.cloudfront.net
Address: 2600:9000:24f7:8800:6:57d:4500:93a1
Name:	d12imtgdm17m6s.cloudfront.net
Address: 2600:9000:24f7:e000:6:57d:4500:93a1
Name:	d12imtgdm17m6s.cloudfront.net
Address: 2600:9000:24f7:2e00:6:57d:4500:93a1
Name:	d12imtgdm17m6s.cloudfront.net
Address: 2600:9000:24f7:da00:6:57d:4500:93a1
Name:	d12imtgdm17m6s.cloudfront.net
Address: 2600:9000:24f7:1800:6:57d:4500:93a1
Name:	d12imtgdm17m6s.cloudfront.net
Address: 2600:9000:24f7:2a00:6:57d:4500:93a1