shell:$ nslookup -timeout=2 -retry=1 'bid.g.doubleclick.net'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	bid.g.doubleclick.net
Address: 172.217.74.157
Name:	bid.g.doubleclick.net
Address: 172.217.74.154
Name:	bid.g.doubleclick.net
Address: 172.217.74.156
Name:	bid.g.doubleclick.net
Address: 172.217.74.155