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

Non-authoritative answer:
mesu.apple.com	canonical name = mesu-cdn.apple.com.akadns.net.
mesu-cdn.apple.com.akadns.net	canonical name = mesu-cdn.origin-apple.com.akadns.net.
mesu-cdn.origin-apple.com.akadns.net	canonical name = mesu.apple.com.edgekey.net.
mesu.apple.com.edgekey.net	canonical name = e1329.g.akamaiedge.net.
Name:	e1329.g.akamaiedge.net
Address: 23.222.20.52