1. Normalize the input
Spaces are removed and the representation is normalized.
🇪🇸 IBAN COUNTRY PROFILE · Spain
Check an IBAN from Spain and understand its structure
An IBAN for Spain always contains 24 characters. After ES and two IBAN check digits, the national BBAN contains 4-character bank identifier, 4-character branch identifier, 10-character account part and 2-character national check digit. IBAN-Test can additionally compare the bank identifier with the available bank directory for Spain.
24 charactersFixed total length
20 charactersNational BBAN
ESISO country code
Structure of an IBAN from Spain
The reference example ES91 2100 0418 4502 0005 1332 shows the country-specific components. It is provided for explanation only and is not a request to make a payment.
ES 91 2100 0418 45 0200051332
ESCountry code
91IBAN check digits
2100Bank identifier
0418Branch identifier
45National check digit
0200051332Account part
| Position | Length | Component | Format |
|---|---|---|---|
| 1–2 | 2 | Country code | Letters: ES |
| 3–4 | 2 | IBAN check digits | Digits |
| 5–8 | 4 | Bank identifier | Digits |
| 9–12 | 4 | Branch identifier | Digits |
| 13–14 | 2 | National check digit | Digits |
| 15–24 | 10 | Account part | Digits |
Validate an IBAN for Spain
This validator accepts only IBANs from the selected country.
What IBAN-Test validates for Spain
Validation covers normalization, country assignment, the fixed 24-character length, the country-specific segment structure and MOD-97. Account ownership and real-time account existence are not checked.
2. Country and structure
ES, the length and the segment sequence are checked.
3. MOD-97
The international checksum catches many typing errors.
4. Available depth
The bank identifier is compared with the available directory.
| Validation step | Available | Details |
|---|---|---|
| Country, length and structure | Yes | ES, 24 characters; 4-character bank identifier, 4-character branch identifier, 10-character account part and 2-character national check digit. |
| MOD-97 checksum | Yes | Mathematical IBAN validation. |
| Known bank identifier | Yes | Compared with the available bank directory for Spain. |
| National account check | No | No additional national account check method. |
| Bank details and BIC | When available | Returned from the available bank directory. |
| IBAN name check | No | No comparison between an account holder’s name and the IBAN. |
| Account existence | No | No request is sent to the account-holding institution. |
Validate an IBAN from Spain via API
The same validation is available through the REST API. The IBAN is sent in the request and is not placed in a public, indexable URL.
curl --get 'https://www.iban-test.eu/api/v2/iban/validate' \
--header 'Authorization: Bearer YOUR_API_TOKEN' \
--data-urlencode 'iban=ES91 2100 0418 4502 0005 1332'When available, the response can include bank details from the country-specific directory.
Generate an IBAN for Spain
The generator accepts up to 4 characters for bankcode and 16 characters for accountnumber. It then calculates the IBAN check digits and validates the result.
curl --get 'https://www.iban-test.eu/api/v2/iban/generate' \
--header 'Authorization: Bearer YOUR_API_TOKEN' \
--data-urlencode 'countrycode=ES' \
--data-urlencode 'bankcode=2100' \
--data-urlencode 'accountnumber=0418450200051332'What a valid IBAN from Spain does not prove
Formal validity is a strong signal against input errors, but it is not real-time confirmation of an account.
No existence confirmation
The account may be closed or unreachable.
No account-holder match
A person or company name is not compared with the IBAN.
No payment guarantee
A valid IBAN does not guarantee that a payment will be accepted.
Bank data can change
Results depend on the bank directory currently available to IBAN-Test.
Privacy: The input is transmitted only for validation and is not placed in the page URL.