shell:$ nslookup -timeout=2 -retry=1 'td.doubleclick.net' Server: 75.98.161.224 Address: 75.98.161.224#53 Non-authoritative answer: Name: td.doubleclick.net Address: 172.217.4.66 Name: td.doubleclick.net Address: 2607:f8b0:4009:818::2002