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

Non-authoritative answer:
js.pusher.com	canonical name = d3dy5gmtp8yhk7.cloudfront.net.
Name:	d3dy5gmtp8yhk7.cloudfront.net
Address: 3.170.134.52