shell:$ nslookup -timeout=2 -retry=1 'img.tradedoubler.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
img.tradedoubler.com	canonical name = d2zs3ok949uz2h.cloudfront.net.
Name:	d2zs3ok949uz2h.cloudfront.net
Address: 108.156.184.49
Name:	d2zs3ok949uz2h.cloudfront.net
Address: 108.156.184.24
Name:	d2zs3ok949uz2h.cloudfront.net
Address: 108.156.184.118
Name:	d2zs3ok949uz2h.cloudfront.net
Address: 108.156.184.129