Routing Number Lookup
Look up US ABA routing numbers with checksum validation.
What is a routing number?
An ABA routing number (Routing Transit Number) is a 9-digit code that identifies a US financial institution. The first 4 digits identify the Federal Reserve district and institution; the next 4 identify the bank itself; the 9th digit is a checksum computed with the weights 3, 7, 1.
- 4 routing numbers
- Verified: 4
- Country
- 1
Routing Number Lookup
4 routing numbers
4 results
| Value | Bank | Country | Status |
|---|---|---|---|
| 021000021 | JPMorgan Chase BankNew York | United States | Verified |
| 026009593 | Bank of AmericaNew York | United States | Verified |
| 021000089 | CitibankNew York | United States | Verified |
| 121000248 | Wells Fargo BankSan Francisco | United States | Verified |
Routing number FAQ
Can a routing number be validated offline?
Yes — the 9th digit is a checksum over the first 8 digits using the repeating weights 3, 7, 1. The checksum catches most transcription errors.
Do routing numbers differ for wires and ACH?
Yes — many US banks publish separate routing numbers for Fedwire and ACH. Always confirm which rail your payment requires.