ABA Number

You encounter ABA numbers every time you handle banking tasks like setting up direct deposits or paying bills online. Banks assign this nine-digit code to identify themselves during financial transactions in the United States. The American Bankers Association created it back in 1910 to streamline check processing and electronic transfers.

People often call the ABA number a routing number or routing transit number. You find it printed on the bottom left of your checks, right before your account number. Banks use this code to direct funds accurately between institutions, whether for wire transfers, ACH payments, or paper checks.

Financial experts rely on ABA numbers to ensure smooth operations in daily banking. You benefit from this system when employers deposit your paycheck directly or when you send money to friends via apps. Regulators maintain a registry of these codes to prevent errors in the vast network of U.S. banks and credit unions.

Synonymous terms like bank routing code highlight its role in secure money movement. You protect your finances by verifying this number before initiating any transfer.