How to Opt Out of Neustar

Neustar, now a subsidiary of TransUnion, is a data analytics company that collects device identifiers, IP addresses, location data, and browsing behavior to power identity resolution, marketing analytics, and fraud detection tools. If you've ever wondered how advertisers seem to follow you across devices and platforms, Neustar's identity graph technology is often the reason. Here's how to opt out.

What Is Neustar?

Neustar was originally a telecommunications data company that managed phone number portability and caller ID services. TransUnion acquired Neustar in 2021 for $3.1 billion, integrating its data assets into TransUnion's broader identity and risk solutions platform.

Today, Neustar operates several data products that affect consumer privacy:

• OneID Identity Graph: Links your devices, email addresses, phone numbers, and physical addresses into a unified identity profile used for cross-device advertising targeting
• Caller ID and Call Authentication: Provides caller identification data to telecommunications carriers and spam-blocking apps
• Marketing Analytics: Helps advertisers match online and offline consumer identities for targeted advertising campaigns
• Fraud Analytics: Uses device fingerprinting and behavioral signals to detect fraudulent transactions
• IP Intelligence: Maps IP addresses to geographic locations, connection types, and organizational data

What Data Does Neustar Collect?

Neustar collects and processes a wide range of personal data:

• Device identifiers: Mobile advertising IDs, browser cookies, and device fingerprints
• IP addresses: Including geolocation data derived from your IP
• Phone numbers: Both landline and mobile, including porting history
• Email addresses: Used for identity matching across platforms
• Physical addresses: Residential and business addresses
• Browsing behavior: Website visits and online activity tracked through cookies and pixels
• Transaction data: Purchase behavior from partner companies

How to Opt Out of Neustar

Method 1: TransUnion Privacy Portal

Since Neustar is now part of TransUnion, the primary opt-out path goes through TransUnion's privacy infrastructure:

1. Visit transunion.com/privacy/neustar for Neustar-specific privacy information
2. Go to transunion.com and scroll to the bottom of the page
3. Click "Your Privacy Choices" in the footer
4. Select your request type: Opt-Out of Sale/Sharing, Delete Personal Information, or Limit Use of Sensitive Information
5. When specifying products, select Neustar or Marketing Solutions
6. Complete the identity verification process
7. Submit your request

Method 2: Neustar Marketing Opt-Out

For Neustar's marketing-specific data products:

1. Visit Neustar's dedicated opt-out page (accessible through TransUnion's Neustar privacy notice)
2. Look for cookie and advertising opt-out controls
3. Use the opt-out mechanism to stop Neustar from using your data for targeted advertising

Method 3: Industry-Wide Advertising Opt-Outs

Neustar participates in industry self-regulatory programs. You can opt out of Neustar's advertising data collection through:

• Digital Advertising Alliance (DAA): Visit optout.aboutads.info to opt out of interest-based advertising from DAA members
• Network Advertising Initiative (NAI): Visit optout.networkadvertising.org for NAI member opt-outs
• Global Privacy Control (GPC): Enable GPC in your browser to automatically signal opt-out preferences to websites and data collectors, including Neustar

Method 4: Contact TransUnion Directly

If the online methods don't work or you want confirmation:

• Email: privacy@transunion.com (specify Neustar products)
• Phone: 1-800-916-8800 (TransUnion Consumer Relations)
• Mail: TransUnion LLC, Attn: Privacy Office, 555 West Adams Street, Chicago, IL 60661

Opting Out of Caller ID Data

If you're concerned about Neustar's caller ID services exposing your personal information:

• Contact your phone carrier to request that your caller ID information be blocked or limited
• Use *67 before making calls to block your caller ID on a per-call basis
• Request a name change in your carrier's caller ID database if your information is incorrect
• Consider a VoIP number (Google Voice, etc.) for calls where you want additional privacy

Limitations of Opting Out

Neustar's opt-out process has significant limitations:

• Device-level opt-outs: Advertising opt-outs are typically cookie-based, meaning they reset when you clear cookies or use a new device
• Ongoing data collection: Opting out of marketing doesn't stop Neustar from collecting data for fraud prevention or telecommunications purposes
• Identity graph persistence: Your identity graph profile may continue to exist even after an opt-out, minus the marketing activation
• Partner data flows: Neustar receives data from partner companies that may continue to feed the system

Comprehensive Protection

Neustar is one node in a vast network of data companies that trade personal information. Opting out of Neustar alone still leaves your data accessible through hundreds of other data brokers and marketing platforms.

PrivacyOn provides comprehensive protection by monitoring and removing your data from 100+ data broker sites across the entire ecosystem. Combined with browser-level protections like Global Privacy Control and ad-blocking extensions, PrivacyOn's continuous monitoring ensures that your personal information is systematically removed from the data broker landscape — not just from one company at a time.

With dark web monitoring included, PrivacyOn also alerts you if your personal data surfaces in breach datasets, giving you early warning to take protective action before your information is exploited.