Routing Number ValidatorVerify ABA Routing Numbers (USA)
Validate any US ABA Routing Number in seconds. Checks format, Federal Reserve District, and check digit. 100% free.
Routing Number Validator
Validates and verifies the format of ABA Routing Numbers (USA).
Format: 9 numeric digits
Routing Number Examples:
What is the Routing Number?
The Routing Number (ABA Number) is a 9-digit code identifying banks and credit unions in the United States. It is used for electronic transfers, checks, and automatic payments.
Routing Number Structure:
- Digits 1-2: Federal Reserve Bank Identifier (01-12)
- Digits 3-8: Unique Bank Identifier
- Digit 9: Check Digit calculated with Modulo 10
Validation Algorithm:
- Multiply the first 8 digits by weights: 3,7,1,3,7,1,3,7
- Sum the results of the multiplications
- Calculate modulo 10 of the sum
- The check digit is: (10 - (sum % 10)) % 10
What is the Routing Number used for?
- • Bank transfers (ACH)
- • Wire transfers
- • Direct deposits and automatic payments
- • Check processing
- • Bill payment setup
What does this tool validate?
- ✅ Check digit calculation
- ✅ Correct format (9 digits)
- ✅ Valid Federal Reserve Bank Identifier
- ✅ Bank information (limited database)
- ❌ Does not verify if routing is active or currently exists
Important:
This tool only validates the format and mathematical structure of the routing number. It does not confirm if the routing is active, officially registered, or belongs to a specific bank. For official verification, consult the ABA (American Bankers Association) database.
Why use our Validator?
The most precise tool for validating Routing Numbers
ABA Algorithm
Verify the check digit using the official algorithm of the American Bankers Association.
100% Safe
Local validation. No data is sent to our servers.
Complete Database
We verify the Federal District and the financial institution.
Routing Number Structure:
Understand how the 9-digit code is formed
Federal District
The first 2 digits identify the Federal Reserve district.
Identifier
The next 4 digits identify the specific financial institution.
Check Digit
The last digit validates the integrity of the code using the ABA algorithm.
Major US Banks
ABA Routing codes from major US banks
Bank of America
All states
Chase Bank
All states
Wells Fargo
All states
Citibank
All states
U.S. Bank
All states
PNC Bank
All states
Capital One
All states
TD Bank
All states
BB&T
All states
Codes shown are for illustrative purposes. Always verify the correct routing number with your bank.
Common Uses of Routing Numbers
Situations where you need your ABA Routing Number
ACH Transfers
Automatic clearing house transfers between banks
- • Direct deposits
- • Bill payments
- • Automatic transfers
Checks
Identification on personal and business checks
- • Personal checks
- • Business checks
- • Money orders
Wire Transfers
Domestic and international bank transfers
- • Domestic transfers
- • Bank-to-bank
- • Same-day delivery
Payment Setup
Setting up direct deposits and automatic payments
- • Direct deposit setup
- • Employer payroll
- • Government benefits
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