What identifier does the ABA Transit Routing Number include?

The ABA Transit Routing Number includes a 10-digit number that consists of a unique identifier for financial institutions in the United States. This number is formatted in such a way that it allows for the efficient and accurate processing of transactions, particularly for checks and electronic transactions. The structure of the routing number includes the capability for a verification digit, which enhances its reliability by helping to prevent errors in routing and processing.

This verification digit serves as a checksum calculated from the other digits in the routing number, offering an additional layer of protection against mistakes during data entry or transmission. Therefore, option B accurately captures the essential characteristics of the ABA Transit Routing Number. Understanding this is critical for anyone involved in financial transactions, as it ensures accurate processing and payment flow in the banking system.