CardGroove
Getting Started Downloads
TOOLS / PIN

PIN Block Formats

ISO 9564 formats 0-4 and legacy PIN block layouts.

PIN field XOR rightmost PAN digits; F fill.

Padding Character

Standard padding is F; other values are non-standard test options.

4-12 digits.

13-19 digits, including the check digit.

Calculator reference

Verification evidence and limitations →

What it calculates

Constructs PIN block fields for ISO and legacy host layouts.

Inputs and methods

Select a format, enter the allowed PIN length, and supply PAN, padding or sequence only when required. ISO-4 optionally accepts an AES key.

Worked example

ISO-2, PIN 1234. No PAN or key is needed.

241234FFFFFFFFFF

Specification and limits

Most results are clear fields. ISO-4 encrypts only when an AES key is supplied. Randomized formats vary on each run.

ISO-4 implementation guidance ↗