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

Non-authoritative answer:
www.pubnub.com	canonical name = b.shared.global.fastly.net.
Name:	b.shared.global.fastly.net
Address: 151.101.1.167
Name:	b.shared.global.fastly.net
Address: 151.101.65.167
Name:	b.shared.global.fastly.net
Address: 151.101.129.167
Name:	b.shared.global.fastly.net
Address: 151.101.193.167