shell:$ nslookup -timeout=2 -retry=1 'www2.assets.heroku.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
www2.assets.heroku.com	canonical name = d378b2dm1308t9.cloudfront.net.
Name:	d378b2dm1308t9.cloudfront.net
Address: 3.171.22.31
Name:	d378b2dm1308t9.cloudfront.net
Address: 3.171.22.116
Name:	d378b2dm1308t9.cloudfront.net
Address: 3.171.22.74
Name:	d378b2dm1308t9.cloudfront.net
Address: 3.171.22.47