Every bank account in Mexico has a CLABE (Interbank Key) as its unique identifier. The CLABE is a series of 18 numbers that you can use to send money between banks in Mexico, similar to the Routing Number in the US.
| Bank Name | CLABE |
|----------------------------|---------------------------|
| Banco Santander (México) S.A. de C.V. | 014012345678901234 |
| Banco Santander (México) S.A. de C.V. (Banca Afirme) | 012012345678901234 |
| Banco Santander (México) S.A. de C.V. (Banca Crecen) | 011012345678901234 |