Bank codes have different names depending on which country your bank account is located. Here is a list that will give you some guidance on which number to choose and how it is referred to in your country:

For US banks make sure you use the correct routing code. These can vary between ACH and Wire. If you use the wrong one - monies sent will be returned. 

Bank codes name by country: 

Country and CurrencyBank Code NameOther Info
Australia (AUD)Bank State Branch or BSB

United Kingdom (GBP)Sort Code
Canada (CAD)Transit or Branch NumberTypically the last 5 digits of your 9 digit transit code (or routing code)

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Unites States (USD)Routing NumberMake sure correct one. Some times US banks use different routing numbers for ACH versus Wire

More to come...