500k_uhq_usa_combo_good_for_facebook,_zalando,_... Apr 2026

: This suggests the list has been "cleaned" or tested (often via "cracking" tools) to ensure these specific credentials work for logging into major platforms like social media (Facebook) or e-commerce sites (Zalando). Common Use Cases

: Indicates the volume of the dataset—in this case, 500,000 lines of data. 500K_UHQ_USA_COMBO_GOOD_FOR_FACEBOOK,_ZALANDO,_...

: Short for a Combo List . This is a text file containing pairs of usernames (or emails) and passwords, usually formatted as username:password or email:password . : This suggests the list has been "cleaned"

: To defend against the misuse of such lists, platforms implement Multi-Factor Authentication (MFA) , rate limiting, and "leaked credential checks" to notify users if their data appears in a known combo list. This is a text file containing pairs of

: A marketing term used by data providers to claim the data has a high "hit rate," meaning the credentials are likely valid, fresh, and haven't been widely circulated or "leaked" to the point of being blocked by security systems.

: The most common use is for automated attacks where bots try these username/password pairs across various websites to gain unauthorized access to accounts.

: These lists are the primary fuel for ATO attacks, leading to identity theft and financial fraud.