The China Construction Bank card number starts with 621700.

The bank card number is meaningful. The first 4 digits are the name code of the bank.

The next four digits are the card's usage code, and the next four digits are the activation time of the card.

The last four digits are the branch location code, and the last three digits are the user's personal code. :

The first digit of each bank card number

China Construction Bank VISA Dragon Debit Card: 436742

China Construction Bank VISA Dragon Credit Card: 436745

China Construction Bank Alipay Long Card Debit Card: 622280

Bank of Communications VISA Ordinary Card: 458123

Bank of Communications MC Credit Card Ordinary Card: 521899

Bank of Communications Pacific Card Debit Card: 622260

Shanghai Bank VISA Gold Card: 402674

Shanghai Bank Debit Card: 622892

China Postal Savings Green Card Debit Card: 622188

Bank of Beijing Jingka Debit Card: 602969

Bank of China Metropolis Card: 622760

Bank of China BOC Series VISA Standard Card Ordinary Card/ VISA University Approval Card: 409666

Bank of China Air China Zhiyin Credit Card: 438088

Bank of China Shanghai Branch Great Wall RMB Credit Card Ordinary Card: 622752

China Industry and Commerce Bank VISA student international credit card: 427020?