Verify US ABA Routing Numbers Instantly

What Is an ABA Routing Number?

An ABA (American Bankers Association) routing number is a nine-digit code used to identify financial institutions in the United States. It's essential for processing checks, ACH transfers, wire transfers, and direct deposits.

ABA Routing Number Structure

The 9-digit routing number has a specific structure that includes Federal Reserve routing symbols, ABA institution identifiers, and a check digit for validation.

Format Breakdown:

• First 4 digits - Federal Reserve routing symbol identifying the Federal Reserve Bank district
• Next 4 digits - ABA institution identifier unique to the specific bank
• Last digit - Check digit calculated using a mathematical algorithm to validate the entire number

Why Validate ABA Routing Numbers?

• Ensure accurate ACH and wire transfers
• Verify bank details before payment processing
• Prevent failed transactions due to incorrect routing numbers
• Confirm direct deposit setups for payroll
• Get complete bank information including address and capabilities

Payment Methods Supported

• ACH Transfers - Electronic funds transfers for direct deposits and bill payments
• Wire Transfers - Same-day electronic transfers for time-sensitive payments
• Check Processing - Paper check clearing and verification