FakecreditcardAbout BIN 521821
In our BIN data, 521821 is a Mastercard Platinum credit card range that belongs to Aeon Credit Card (Taiwan) Co., Ltd., registered in Taiwan. Credit cards spend against a credit line that the cardholder repays later; interchange fees and fraud rules usually differ from debit cards. Platinum is a premium tier; the issuer sets the benefits and limits, but it ranks above the entry-level products.
With 16 BINs, Aeon Credit Card (Taiwan) Co., Ltd. ranks 26th among the 31 banks we list for Taiwan. The Aeon Credit Card (Taiwan) Co., Ltd. BIN list shows all of them with network, type and level.
Across Taiwan, the dataset counts 1,262 BINs; among the 1,167 that name an issuer, the main networks are Mastercard (38%), Visa (38%), JCB (10%), and 10% are debit. See the Taiwan BIN list or the Taiwan card generator.
Mastercard number format for BIN 521821
| Starts with | 521821 (the BIN). First digit 5: banking and financial |
|---|---|
| Length | 16 digits |
| Security code | 3-digit CVC2 on the back |
| Check digit | The last digit, calculated with the Luhn algorithm |
| Printed as | 5218 2141 5752 5779 |
When you test with this BIN, check that your form shows the Mastercard logo, groups the 16 digits correctly and rejects numbers whose check digit is wrong. The generator creates as many numbers with this BIN as you need, with expiry dates and CVVs, as CSV, JSON or XML.
Nearby BINs
BINs just below and above 521821. Banks often hold consecutive ranges, so neighbours can be sister products of the same issuer.
More BINs from Aeon Credit Card (Taiwan) Co., Ltd.
All 16 BINs of Aeon Credit Card (Taiwan) Co., Ltd. →
Frequently asked questions
Which bank issued BIN 521821?
BIN 521821 is registered to Aeon Credit Card (Taiwan) Co., Ltd. in Taiwan. Bank details can change after mergers or portfolio sales, so confirm with the bank for anything important.
Is 521821 a debit or a credit card BIN?
It is recorded as credit, product level Platinum. Credit cards spend against a credit line that the cardholder repays later; interchange fees and fraud rules usually differ from debit cards.
How many digits does a card with BIN 521821 have?
Mastercard card numbers have 16 digits, and the security code is a 3-digit CVC2 on the back. The first six digits are the BIN, the last digit is the Luhn check digit, and the digits in between identify the account.
Can I generate test card numbers with BIN 521821?
Yes. Open the generator with this BIN to create Luhn-valid numbers with expiry dates and CVVs for testing forms, validation and BIN-based rules. They are test data: not issued by Aeon Credit Card (Taiwan) Co., Ltd., linked to no account and declined by real payment systems.
Does a BIN tell me whether a card is valid?
No. A BIN describes a range of card numbers — network, issuer, country and product — not a particular card. Whether a card exists or can be charged is known only to the issuing bank. To check the format of a full number (length and check digit), use the card validator.
A BIN identifies the card network and the issuing institution only. It reveals nothing about an individual card, cardholder or account, and it cannot show whether a card exists or can be charged. Test numbers generated from a BIN are for development and QA only and are declined by every real payment system.
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BIN data: bin-list-data by Venelin Kochev (a lite version of binlookup.io), licensed under CC BY 4.0. Changes made by Fakecreditcard: issuer, brand and country names re-cased and standardized, spelling variants of the same issuer merged, malformed phone numbers and web addresses removed.