shell:$ nslookup -timeout=2 -retry=1 'assets.rbl.ms'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
assets.rbl.ms	canonical name = rebelmouse.map.fastly.net.
Name:	rebelmouse.map.fastly.net
Address: 151.101.1.68
Name:	rebelmouse.map.fastly.net
Address: 151.101.65.68
Name:	rebelmouse.map.fastly.net
Address: 151.101.129.68
Name:	rebelmouse.map.fastly.net
Address: 151.101.193.68