rb.adnxs.com: Xandr’s Invasive Ad Targeting

Xandr, owned by Microsoft, operates rb.adnxs.com to track your online behavior across websites, feeding data into their advertising platform for real-time ad targeting. This deeply invades your privacy. Here’s what it collects and how to protect yourself.

What Is rb.adnxs.com?

This domain is part of Xandr’s digital advertising ecosystem, monitoring your interactions with ads and websites to build a detailed user profile. It powers real-time bidding for personalized ads, prioritizing profit over privacy. As Privacy Auditors, we’re troubled by the scale of this surveillance.

Data It Collects

When you visit a site with Xandr ads, rb.adnxs.com captures:

• IP Address: Pinpoints your network location for tracking.
• Geolocation: Approximates your physical position from IP data.
• Browsing Behavior: Tracks sites visited, ads viewed, and clicks.
• Ad Interaction Data: Logs ad impressions, clicks, and timestamps.
• Device Fingerprint: Captures browser, OS, and device specifics.
• User-Agent String: Records details like ‘Mozilla/5.0 (Windows NT 10.0; Win64; x64)’.
• Cookie IDs: Ties actions to unique tracking identifiers.
• Referrer URL: Notes the site or link you came from.
• Timestamps: Logs the time of each interaction.

This data creates a comprehensive profile for hyper-targeted advertising.

Who Gets Your Data?

Xandr shares your information with:

• Third-Party Advertiser: Uses data for real-time ad bidding and targeting.
• Website Publisher: Gets analytics from Xandr’s ad services.
• Xandr Affiliate: Processes data for profiling and reporting.
• Law Enforcement Agency: Per Microsoft’s 2024 transparency report, complies with over 165,000 requests annually, with 70% U.S. compliance for IP and ad data.

How to Protect Yourself

Privacy Auditors are here to help you resist invasive ad trackers like rb.adnxs.com. Follow these steps:

• Install Tracker Blockers: Use Privacy Auditor’s tools to block Xandr scripts.
• Mask with a VPN: Hide your IP address using a VPN like Mullvad.
• Use Privacy Browsers: Switch to Firefox with strict tracking protection or Tor.
• Opt Out of Ads: Use Microsoft’s ad privacy settings to limit targeting.
• Clear Cookies Regularly: Delete tracking cookies to disrupt profiling.

Layer these defenses to minimize Xandr’s ability to track you.

Sources

• Xandr Privacy Policy: https://about.ads.microsoft.com/en-us/resources/privacy-policy

This is a legal disclaimer. All information is provided for educational purposes only.