Credit Card Middle-Digit Brute Force (Virtualized List)
Enter the first 6 and last 4 digits, choose the total length, then brute force. Valid full numbers are listed in a virtualized pane so you can count manually. All computation runs locally in your browser.

Must be exactly 6 digits.

Must be exactly 4 digits.

Typical cards are 15–19 digits.

Prevents memory issues for huge runs. Count is still accurate even when list is truncated.

Unknown middle digits
6
Total combinations to test
1,000,000
Matches found
0
Items stored in list
0
Progress: 0.00%Processed: 0 / 1,000,000ETA: —

Matches (virtualized)

Tip: Use the Export button to save the currently stored list to a file. For very large results, raise the “Max items to keep in list” cap and rerun, but be mindful of memory.

What is being tested?

For every possible middle value between the first 6 and last 4 digits you entered, we build the full number and run the Luhn checksum. When it passes, we count it and, up to the configured cap, add it to the virtualized list. This keeps the page responsive while still letting you scroll through every kept match to count manually.