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Istanbulkart transit and payment card

Credit Card

Istanbulkart: Both Transit Card and Payment Card

When I think back to the Akbil I used when I first arrived in Istanbul, I think it's fair to say that Istanbulkart has undergone a very significant transformation. Users can now track activity, top up and view balances right from their phones.

Diagram illustrating the ISO 8583 field 32 structure

ISO 8583

ISO 8583 Field Descriptions (F32)

F32 - ACQUIRING INSTITUTION IDENTIFICATION CODE: the 11-digit acquirer bank ID. The values it can take for domestic transactions and by card brand include Visa, MasterCard, UnionPay, Discover and JCB formats.

Diagram illustrating how a recycling ATM reuses deposited banknotes for withdrawals

ATM

What Is a Recycling ATM?

The word literally means recycled or circulating. In payment systems, it refers to physically dispensing money deposited at ATMs to customers who want to withdraw cash, adding deposits straight into the withdrawal pool.

Diagram illustrating the ISO 20022 financial messaging standard

Payment Systems

What Is ISO 20022?

There are standards that keep payment systems running smoothly and reliably. One of these is ISO 20022. So what is ISO 20022, and why was it created? It is an international, XML-based financial messaging standard developed in 2009.

ISO 8583 field 35 Track 2 data

ISO 8583

ISO 8583 Field Descriptions (F35)

The card's Track 2 data is carried in this field. Track 2 data contains information such as the card number, expiry date and service code.

Table showing service code values and their meanings for payment cards

Credit Card

What is the Service Code on Cards?

The service code is information printed on a card's Track 1 and Track 2 data, covering card type, PIN usage, and domestic/international usage status. It is kept at the product level in bank systems.

Diagram of chip card file structure showing MF, DF, and EF layers

EMV

What is Dedicated File Name (DFN)?

DFN is the abbreviation for Dedicated File Name. It defines the name of the DF (Dedicated File) as described in ISO/IEC 7816-4. It is the data found in Tag 84, 5 to 16 characters in length.