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: 209.85.145.156
Name:	bid.g.doubleclick.net
Address: 108.177.121.157
Name:	bid.g.doubleclick.net
Address: 142.251.189.154
Name:	bid.g.doubleclick.net
Address: 108.177.121.155
Name:	bid.g.doubleclick.net
Address: 142.251.189.156
Name:	bid.g.doubleclick.net
Address: 192.178.210.154
Name:	bid.g.doubleclick.net
Address: 142.251.189.155
Name:	bid.g.doubleclick.net
Address: 172.217.214.157
Name:	bid.g.doubleclick.net
Address: 192.178.210.157
Name:	bid.g.doubleclick.net
Address: 192.178.209.157
Name:	bid.g.doubleclick.net
Address: 108.177.121.154
Name:	bid.g.doubleclick.net
Address: 108.177.121.156
Name:	bid.g.doubleclick.net
Address: 192.178.209.156
Name:	bid.g.doubleclick.net
Address: 192.178.210.156
Name:	bid.g.doubleclick.net
Address: 142.251.189.157
Name:	bid.g.doubleclick.net
Address: 192.178.209.155