31.zip Apr 2026

Technical manuals, such as the HIOS RBIS User Manual , reference "Figure 31: ZIP Code Field" in their documentation of software interfaces.

: In research papers, "31 ZIP" may refer to specific geographical data projects, such as mapping poverty rates at the zip code level. HIOS RBIS User Manual | CMS 31.zip

In non-malicious contexts, "31.zip" often serves as a shorthand or version-specific filename: Technical manuals, such as the HIOS RBIS User

: It is associated with Tycoon 2FA , a "phishing-as-a-service" platform designed to bypass multi-factor authentication (MFA) for Microsoft 365 and Gmail accounts. 31.zip