shell:$ nslookup -timeout=2 -retry=1 'pixel.rubiconproject.com'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
pixel.rubiconproject.com	canonical name = pixel.rubiconproject.net.akadns.net.
Name:	pixel.rubiconproject.net.akadns.net
Address: 216.19.192.2