FakecreditcardAbout BIN 521866
In our BIN data, 521866 is a Mastercard World debit card range that belongs to China Construction Bank, registered in China. Debit cards draw money directly from the cardholder's bank account, so checkouts and gateways often treat them differently from credit cards (fees, holds, recurring billing). World and World Elite are Mastercard's premium consumer tiers, above Standard and Gold.
With 143 BINs, China Construction Bank ranks 7th among the 41 banks we list for China. The China Construction Bank BIN list shows all of them with network, type and level.
Across China, the dataset counts 18,370 BINs; among the 6,236 that name an issuer, the main networks are UnionPay (39%), Private label (21%), Local brand (15%), and 66% are debit. See the China BIN list or the China card generator.
Mastercard number format for BIN 521866
| Starts with | 521866 (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 6635 6951 6323 |
A checkout that receives a number starting with 521866 should detect Mastercard, expect 16 digits and ask for a 3-digit security code. The generator creates as many numbers with this BIN as you need, with expiry dates and CVVs, as CSV, JSON or XML.
Nearby BINs
The BINs closest to 521866 in our data. Neighbouring ranges often belong to the same bank, but not always — each range is assigned separately.
More BINs from China Construction Bank
All 143 BINs of China Construction Bank →
Frequently asked questions
Which bank issued BIN 521866?
BIN 521866 is registered to China Construction Bank in China. The dataset lists the website en.ccb.com. Bank details can change after mergers or portfolio sales, so confirm with the bank for anything important.
Is 521866 a debit or a credit card BIN?
It is recorded as debit, product level World. Debit cards draw money directly from the cardholder's bank account, so checkouts and gateways often treat them differently from credit cards (fees, holds, recurring billing).
How many digits does a card with BIN 521866 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 521866?
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 China Construction Bank, 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.