SEPA coverage · 🇨🇿 CZ
Convert Czech Republic IBANs to their BIC
Every Czech Republic IBAN is 24 characters long and starts with CZ. The bank identifier embedded inside it is what resolves to a BIC/SWIFT code, the bank's name and address, and its SEPA reachability.
The Czech Republic IBAN format
Example of a valid Czech Republic IBAN:
CZ65 0800 0000 1920 0014 5399
| Segment | Length | Example | Meaning |
|---|---|---|---|
| Country code | 2 | CZ | Always CZ |
| Check digits | 2 | 65 | ISO 7064 mod-97 checksum over the whole IBAN |
| Bank code | 4 | 0800 | Numeric code identifying the Czech bank |
| Account prefix | 6 | 000019 | Optional prefix of the domestic account number, zero-padded |
| Account number | 10 | 2000145399 | Numeric account identifier, zero-padded |
The Czech Republic keeps the koruna (CZK), but Czech banks are fully SEPA-reachable for euro payments. The IBAN embeds the domestic prefix + account number format.
How to get the BIC from a Czech Republic IBAN
Validate the IBAN
Check the length (exactly 24 characters for CZ) and the ISO 7064 mod-97 checksum. Both are local computations — no lookup needed yet.
Extract the bank identifier
The bank code (4 characters) inside the BBAN identifies the institution holding the account.
Resolve it to a BIC
Map the bank identifier to the institution's BIC via registry data — or send the IBAN to the API and get BIC, bank details and SEPA flags in one response.
Resolve it with one API call
Send the IBAN to POST /v1/convert and get back the BIC, bank details and the four SEPA reachability flags. Invalid and not-found lookups are always free.
curl https://api.iban2bic.com/v1/convert \
-H "Authorization: Bearer ibk_live_xxx" \
-H "Content-Type: application/json" \
-d '{ "iban": "CZ6508000000192000145399" }'Czech Republic IBAN — frequently asked
Other SEPA countries
Keep reading
Resolve Czech Republic IBANs programmatically
BIC, bank details and SEPA reachability for any CZ IBAN — €0.009 per successful call, failures always free.