1. Normalize the input
Spaces are removed and the representation is normalized.
🇨🇿 IBAN COUNTRY PROFILE · Czechia
Check an IBAN from Czechia and understand its structure
An IBAN for Czechia always contains 24 characters. After CZ and two IBAN check digits, the national BBAN contains 4-character bank identifier, 6-character branch identifier and 10-character account part. IBAN-Test can additionally compare the bank identifier with the available bank directory for Czechia.
24 charactersFixed total length
20 charactersNational BBAN
CZISO country code
Structure of an IBAN from Czechia
The reference example CZ65 0800 0000 1920 0014 5399 shows the country-specific components. It is provided for explanation only and is not a request to make a payment.
CZ 65 0800 000019 2000145399
CZCountry code
65IBAN check digits
0800Bank identifier
000019Branch identifier
2000145399Account part
| Position | Length | Component | Format |
|---|---|---|---|
| 1–2 | 2 | Country code | Letters: CZ |
| 3–4 | 2 | IBAN check digits | Digits |
| 5–8 | 4 | Bank identifier | Digits |
| 9–14 | 6 | Branch identifier | Digits |
| 15–24 | 10 | Account part | Digits |
Validate an IBAN for Czech Republic
This validator accepts only IBANs from the selected country.
What IBAN-Test validates for Czechia
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
CZ, 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 | CZ, 24 characters; 4-character bank identifier, 6-character branch identifier and 10-character account part. |
| MOD-97 checksum | Yes | Mathematical IBAN validation. |
| Known bank identifier | Yes | Compared with the available bank directory for Czechia. |
| 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 Czechia 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=CZ65 0800 0000 1920 0014 5399'When available, the response can include bank details from the country-specific directory.
Generate an IBAN for Czechia
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=CZ' \
--data-urlencode 'bankcode=0800' \
--data-urlencode 'accountnumber=0000192000145399'What a valid IBAN from Czechia 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.