shell:$ nslookup -timeout=2 -retry=1 'us19.campaign-archive.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
us19.campaign-archive.com	canonical name = us19.mailchimp.com.
us19.mailchimp.com	canonical name = swc2.mailchimp.com.edgekey.net.
swc2.mailchimp.com.edgekey.net	canonical name = e230.x.akamaiedge.net.
Name:	e230.x.akamaiedge.net
Address: 23.38.76.149