Istanbulkart number is a unique number similar to a credit card number, which is used to distinguish cards from each other. It is the 16-digit number on the front of your Istanbul card or the 14-digit number starting with 04 on the back of your card. Can be used to fill in both numbers.
You can check the card numbers from the image below.
As the Istanbulkart number, you can first use the 16-digit number on the front of the card. If this number is not readable, you can use the 14-digit number starting with 04 on the back of the card as the card number. If this number is also not readable, you can learn these two numbers by scanning the QR code on the card..
You can enter your Istanbulkart number in 3 ways: