Bulk routing number checker

Passing the checks isn't proof

The checks catch typos. They can't tell you whether a number is in use or which bank it belongs to. Where we have the number, its label says how far it's confirmed. Confirm with the bank before you send money.

The three routing number checks

1. Format. Exactly 9 digits.
2. Federal Reserve prefix. The first two digits fall in a range the Federal Reserve uses: 00–12, 21–32, 61–72, or 80.
3. Checksum. The digits, weighted 3, 7, 1 in turn, add up to a multiple of 10. This catches any single mistyped digit and most swapped pairs.

What the verification labels mean

Bank-verified

Confirmed against the bank's own published page.

Cross-checked

Listed for the bank across several public routing directories, not confirmed by the bank.

Unconfirmed

Listed in public data, not yet confirmed.

Not in our data

We don't have this number. It may still be in use, so check with the bank.

Bulk check questions

How many routing numbers can I check at once?

Up to 100 per run. If you paste more, the checker runs the first 100 and tells you how many are left for the next run.

Does passing the checks mean a routing number is valid?

It means the number is well-formed: 9 digits, a Federal Reserve prefix, and a correct checksum. It doesn't show that the number is in use or which bank it belongs to. Confirm with the bank before you send money.

Where does the bank name come from?

From fin.codes' published routing-number data. Each match carries a label (Bank-verified, Cross-checked, or Unconfirmed) that says how far it's confirmed. A number we don't have shows as Not in our data.