TransUnion LLC: Access a full range of technical resources

Increase to TransUnion Net Access (TUNA) Availability

Reminder to all TUNA customers who blacklist outbound traffic: you will need to whitelist the IP address range listed below to leverage TransUnion's secondary TUNA platform, which will enhance its current High Availability even further, as well as "future-proof" for upcomingTransUnion products.

IP address range:

SSL 3.0 no longer supported by TransUnion

TransUnion no longer supports Secure Sockets Layer (SSL) 3.0. The preferred Internet Browser versions include:
  • Internet Explorer (IE), versions 7-11(v11 highly preferred)
  • Google Chrome, versions 1-40
  • Mozilla Firefox, versions 1-36


Receive answers to the most commonly asked technical questions.

Troubleshooting Guide

Access tips to help resolve common transaction-based error conditions.

Legal and Regulatory Announcements

Stay abreast of the latest legal, regulatory and Fair Credit Reporting Act (FCRA) requirements that may affect your business.