BIN 555555 — Mastercard Credit Test Numbers

BIN details

BIN / IIN

555555

Network

Mastercard

Card type

Credit

Number length

16 digits (test card)

Source

Stripe test cards

Mastercard credit test card.

Example numbers from BIN 555555

These examples were generated with the Luhn algorithm. They are structurally valid but have no balance and cannot be charged.

• 5555 5567 9178 2211
• 5555 5587 3066 6810
• 5555 5569 1926 6485
• 5555 5526 8410 0363
• 5555 5546 6294 3400

Use the generator above for a fresh set, or to create cards in bulk.

About BIN 555555

555555 is the first 6 digits of a Mastercard card number. The BIN (Bank Identification Number), formally called the IIN (Issuer Identification Number), tells payment systems which network and institution a card belongs to. Payment providers document test card numbers that start with this prefix. Those exact numbers only work in the providers' sandboxes; the prefix itself is not reserved by the card network, and real cards can share it.

Issuer BIN ranges are reassigned over time, so always confirm critical decisions with the card network or your acquirer. Want to classify another prefix? Use the BIN checker. Looking for provider-specific test numbers? See the test card numbers reference. Need to validate a full number? Try the Luhn validator.

FAQ

Can I use BIN 555555 for real payments?

No. These numbers are for testing only. They have no balance and cannot be charged. Attempting real transactions with numbers you do not own is illegal.

Do the generated numbers pass Luhn validation?

Yes. Every number is generated with a valid check digit, so it passes the Luhn (MOD 10) check — exactly like a real card number would.

Will my gateway accept these numbers?

In test mode, gateways typically accept only their own documented test numbers. Generated numbers are best for validating formatting, Luhn checks, storage and UI behaviour.