|Privacy information definitions (About DefBoxes)|
Tracking methods: How the entity collects data about and tracks individuals.
Collected information: This is information that the entity collects, either through you providing the information or from automatic methods.
Cookies: Cookies are small files that are stored on your computer that are normally used for tracking or storing user preferences. More information.
DoubleClick uses both cookie and IP address based tracking for targeted advertising. 
Information that doubleclick.net collects includes: 
Cookies that may be set by DoubleClick include:
Date retrieved: July 16, 2013
Registrant: DNS Admin Google Inc. 1600 Amphitheatre Parkway Mountain View CA 94043 US email@example.com +1.6502530000 Fax: +1.6506188571 Domain Name: doubleclick.net Registrar Name: Markmonitor.com Registrar Whois: whois.markmonitor.com Registrar Homepage: http://www.markmonitor.com Administrative Contact: DNS Admin Google Inc. 1600 Amphitheatre Parkway Mountain View CA 94043 US firstname.lastname@example.org +1.6502530000 Fax: +1.6506188571 Technical Contact, Zone Contact: DNS Admin Google Inc. 1600 Amphitheatre Parkway Mountain View CA 94043 US email@example.com +1.6502530000 Fax: +1.6506188571 Created on..............: 1996-01-15. Expires on..............: 2018-01-16. Record last updated on..: 2013-05-01. Domain servers in listed order: ns1.doubleclick.net ns4.doubleclick.net ns2.doubleclick.net ns3.doubleclick.net
DoubleClick uses this subdomain to load assets and to redirect and track ad clicks.
Used for tracking ad clicks and redirecting to advertiser sites.
Used for DoubleClick Floodlight, which tracks user activities on websites after a user clicks on an ad for the website.
Used for loading scripts related to advertising. Used to track ad clicks for Google ads.
Used for loading images.
Used for loading tracking pixels or as an alternative for loading Google Analytics.
Used for loading assets for Google Customer Surveys.
2mdn.net: used for loading ad content from DoubleClick