El clearing es lo que te pide como "banco central" vamos que debes poner que banco es, se basa en un sistema de seguridad para saber por donde se mueve el dinero. Ya te digo que lo sé de casualidad eso, porque yo de Banca no tengo mucha idea.
Pues no, pero la cosa está aquí explicada:
Austria has a 5-digit bank code (called Bankleitzahl as in Germany).
Belgium has a national system with account numbers of 12 digits. There are no separate bank codes. The first 3 digits of the account number are called the protocol number, and indicate the bank the account belongs to.
Czech Republic has 4-digit bank codes, used behind account number (Czech domestic account number is XXXXXX-YYYYYYYYYY/CCCC, where CCCC is bank code). A bank branch cannot be identified from the bank code.
Denmark has 4-digit bank code (called Registreringsnummer, or Reg. nr.).
France has a 10 digit code, the first 5 digits contain the clearing identifier of the banking company (Code Banque), followed by the 5-digit branch code (Code Guichet). Both numbers are only used as a combined prefix for the nationwide full account number.
Germany has an 8-digit routing code. The first 4 digits identify the banking company and the latter 4 digits are assigned to the branch. In the 4-digit bank identifier:
the first digit corresponds to one of 8 clearing regions of Germany,
the first 3 digits (clearing region identifier and the next 2 digits after it) identify a "banking location" (Bankplatz),
the last digit (4th in the whole routing code) denotes a banking company's classification (Bankengruppe).
For bank classification values and identifiers for German clearing regions, see Bankleitzahl (in German).
For a comprehensive list of Germany's "banking location" identifiers, see Bankplätze (in German).
Greece has a 7-digit Ηellenic Bank Identification Code (HEBIC), where the first 3 digits are the bank code and the last 4 the branch code.
Ireland uses a 6-digit sort code followed by an 8-digit account number similar to and partially integrated with the UK system.
Italy has a similar clearing system is used with 5 digits identifying the banking company (Codice ABI), followed by a 5-digit CAB (Codice di Avviamento Bancario) identifying the branch, followed by the account number.
The Netherlands has a national system with account numbers of 9 or 10 digits. There are no separate bank codes. The first 5 digits of the account number can be used to identify the bank (originally also the branch, but clients can now often keep their account number when they move to another branch).
Spain also has a similar format, with the first 4 digits identifying the banking company, the next 4 identifying the branch, the next 2 being the checksum, followed by the 10-digit account number.
Switzerland has a 3 to 5 digit bank code (Bankenclearing-Nummer); the first digit indicates the bank's classification group. Following after the bank code, a 4-digit number branch code identifier. For a list of Swiss bank codes, see BC-Nummer (in German).
Sweden has 4 digit bank codes (clearingnummer). For a list of Swedish bank codes, see lista över clearingnummer till svenska banker (in Swedish).
The UK has a 6-digit sort code. For prefixes identifying UK banking companies, see the list of sort codes of the United Kingdom.