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

Non-authoritative answer:
assets.rbl.ms	canonical name = rebelmouse.map.fastly.net.
Name:	rebelmouse.map.fastly.net
Address: 146.75.9.68