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3D Secure ECI Value Lookup

Decode the ECI from a 3DS authentication (05/06/07 for Visa, 02/01/00 for Mastercard).

Tool inputs stay in your browser · optional AI search sends your query

Good to know: The ECI says how strongly the cardholder was authenticated. Liability shift rules depend on the network and region.

How to use it (step by step)

  1. 1Fill in the boxes: “ECI value”. Example numbers are already there so you can see how it works; replace them with yours.
  2. 2The result updates instantly as you type (on a phone it is below the boxes).
  3. 3The bold line is the main answer. Tap Copy next to any value to copy it.

Words to know

3D Secure (3DS)
The extra step where your bank asks you to confirm a payment (an OTP or app approval). It protects against stolen cards.
ECI
A small code that tells how well the cardholder was verified in 3D Secure.

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