Bulk Bank Card BIN Checker

What is a Bank Card BIN Code?

The first 6 digits of every bank card make up the BIN (Bank Identification Number), which is uniformly assigned to financial institutions by the International Organization for Standardization (ISO). It acts as the "ID card" of a bank card, determining which bank issued the card, the card type, and the region of issuance. For example, a card starting with "621700" is definitely from China Construction Bank, while "622848" belongs to the Agricultural Bank of China. The digits following the BIN code are the individual account number and the checksum digit. The entire card number structure complies with the ISO/IEC 7812 standard.

For scenarios like financial auditing, data cleaning, and batch card verification, querying bank card attribution information one by one is extremely time-consuming. This tool helps you extract the BIN codes of hundreds of card numbers at once, automatically matches them against a bank database via an API, and quickly returns structured information such as the issuing bank, province/city, card type, and customer service phone number.

How to Use the Batch Lookup Tool

1. Open the Bank Card BIN Batch Lookup page. You will see a multi-line text input box prompting you to "Enter bank card numbers, one per line."
2. Paste the bank card numbers you want to query into the input box, ensuring there is only one card number per line. Alternatively, you can click "Download Template" to get a CSV template, fill in the card numbers, and import them all at once using the "Upload File" button.
3. Click the "Query" button. The tool will automatically extract the first 6 digits (BIN code) of each card and call the backend API to match them against the bank database one by one. A progress bar will show the current completion status.
4. Once the query is complete, a results table will be generated on the right (or below). Each row corresponds to an input card number, displaying fields like issuing bank, card type, location, and customer service phone number.
5. You can click the "Export CSV" or "Export Excel" button to save the query results locally for future reconciliation or archiving.

A single batch query supports up to 500 card numbers. If you exceed this amount, please query them in batches.

Complete Example: Inputting Card Numbers to See Results

Let's assume we have 3 bank card numbers that need to be verified. Paste them into the input box:

622848001234567890
6217000123456789
6230520001234567

After clicking "Query," the tool will sequentially extract the three BIN codes "622848," "621700," and "623052," retrieve information via the API, and display it in the results table. You might see returned content similar to the following (data is for reference only):

From the table, you can quickly determine which are standard debit cards and which are special co-branded cards. For example, cards starting with 623052 typically correspond to ICBC's social security co-branded cards, which often require extra attention during reimbursement audits. The "Province/City" in the results refers to the issuing bank's registered address or headquarters, which does not necessarily equal the user's current account-opening city. This is an important distinction to note when interpreting the results.

How to Interpret the Results

Each field in the query results has a specific meaning. Understanding them will help you better utilize the data:

• Issuing Bank: The bank corresponding to the card, such as Bank of China or China Merchants Bank. If it returns "Unknown" or "Unmatched," it means the BIN code has not yet been included in the database, possibly indicating a newly issued card type.
• Card Type: Common return values include "Debit Card," "Credit Card," "Semi-credit Card," and "Prepaid Card." Different card types have different compliance requirements; for instance, corporate reimbursements typically only accept debit card records.
• Brand: The vast majority of domestic (Chinese) bank cards will show "UnionPay," while a few dual-currency cards might show "Visa," "Master