shell:$ nslookup -timeout=2 -retry=1 'pagead2.googleadservices.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	pagead2.googleadservices.com
Address: 172.253.132.156
Name:	pagead2.googleadservices.com
Address: 172.253.132.154
Name:	pagead2.googleadservices.com
Address: 172.253.132.157
Name:	pagead2.googleadservices.com
Address: 172.253.132.155