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: 64.233.179.154
Name:	bid.g.doubleclick.net
Address: 74.125.132.155
Name:	bid.g.doubleclick.net
Address: 74.125.132.154
Name:	bid.g.doubleclick.net
Address: 74.125.201.156
Name:	bid.g.doubleclick.net
Address: 74.125.126.155
Name:	bid.g.doubleclick.net
Address: 74.125.201.155
Name:	bid.g.doubleclick.net
Address: 74.125.132.156
Name:	bid.g.doubleclick.net
Address: 64.233.179.156
Name:	bid.g.doubleclick.net
Address: 64.233.179.157
Name:	bid.g.doubleclick.net
Address: 74.125.202.155
Name:	bid.g.doubleclick.net
Address: 74.125.201.157
Name:	bid.g.doubleclick.net
Address: 74.125.201.154
Name:	bid.g.doubleclick.net
Address: 74.125.202.156
Name:	bid.g.doubleclick.net
Address: 74.125.126.154
Name:	bid.g.doubleclick.net
Address: 74.125.132.157
Name:	bid.g.doubleclick.net
Address: 64.233.179.155