Calculator reference
Verification evidence and limitations →
What it calculates
Hides selected digits while preserving a chosen visible prefix and suffix.
Inputs and methods
12-19 digit PAN; first 6/last 4, first 4/last 4, or last 4 only.
Worked example
Enter synthetic PAN 4111111111111111 and choose First 6 Last 4.
411111******1111
Specification and limits
Masking changes display only. It is not encryption or proof that a number identifies a real card.
PCI SSC standards ↗