Credit Card BIN / Brand Detector

About this tool

Identify the card network (Visa, Mastercard, Amex, Discover and more) from the leading digits, the Bank Identification Number (BIN). For format/testing use only.

Example

Input: 4242 42

Output: Brand: Visa (BIN 424242)

Privacy

This tool runs entirely in your browser. Your data is processed locally and never uploaded to a server.

How to use this tool

1. Enter the first digits of a card number, or the full number if you have it for testing.
2. Click the lookup action to identify the likely card network and card type.
3. Read the result and compare it with the brand you expect, such as Visa, Mastercard, Amex, or Discover.
4. Use the output to test your form logic, validation rules, or BIN-based routing.

Step by step, what happens

1. The tool reads the leading digits of the number, because BIN or IIN data is stored at the start of the card number.
2. It compares those digits against known issuer ranges and network patterns.
3. It returns the matched card brand and, when available, the card type or additional issuer details.
4. If the input is too short or does not match a known range, it shows an unrecognized or partial result for testing.

Worked example

A developer wants to check whether a test card number starts with a Mastercard BIN.

Input: 555555

1. Paste the leading digits 555555 into the lookup field.
2. Run the tool to match those digits against known BIN ranges.
3. The tool identifies the network associated with that prefix.

Tips and common mistakes

• Use only test data or partial numbers for development, not real customer card numbers.
• The first digits are what matter here, so you do not need the full PAN to get a BIN lookup result.
• If the result looks wrong, check that you did not include spaces, hidden characters, or extra digits before the BIN.
• Remember that BIN ranges can change, so always trust the tool result over an old hardcoded list.

Frequently asked questions