Routing Number Validator

About Routing Number Validator

Enter a 9-digit ABA routing number to validate it using the official modulus-10 checksum algorithm defined by the American Bankers Association. The tool verifies the number's mathematical validity, identifies the Federal Reserve processing center from the first two digits, determines whether it's for electronic transfers (ACH), wire transfers, or check processing, and displays the check digit calculation step-by-step. 100% client-side — no data sent to any server.

Routing Number Validator Features

• ABA checksum validation
• Federal Reserve district identification
• Transfer type detection
• Step-by-step calculation
• 100% client-side