Get a list of Federal Reserve E-Payments Routing Directory from the Federal Reserve Financial Services. This database will provide you with a known list of financial entities and their ABA (routing) numbers plus other useful information like bank name, city, state, etc. You can also get a way to validate an unknown ABA number through a simple formula.


Add this line to your application's Gemfile:

gem 'aba_numbers'

And then execute:

$ bundle

Or install it yourself as:

$ gem install aba_numbers


TODO: Write usage instructions here


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request