shell:$ nslookup -timeout=2 -retry=1 'assets.heroku.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
assets.heroku.com	canonical name = s3.amazonaws.com.
Name:	s3.amazonaws.com
Address: 16.15.177.142
Name:	s3.amazonaws.com
Address: 52.217.47.126
Name:	s3.amazonaws.com
Address: 54.231.199.176
Name:	s3.amazonaws.com
Address: 16.15.218.106
Name:	s3.amazonaws.com
Address: 52.217.105.166
Name:	s3.amazonaws.com
Address: 16.182.35.192
Name:	s3.amazonaws.com
Address: 16.15.177.136
Name:	s3.amazonaws.com
Address: 54.231.171.104