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IBAN Structure Sao Tome and Principe

Last reviewed: · Source: ISO 13616 / SWIFT IBAN Registry

São Tomé and Príncipe's IBAN has 25 characters in the format STkk BBBB BBBB BBBB BBBB BBBB B. After the country code ST and the check digits come a 4-digit bank code, a 4-digit branch code, the 11-digit account number and two national check digits. São Tomé and Príncipe is not a SEPA participant. The currency is the dobra (STN), pegged to the euro at a fixed rate. For international payments, routing details, fees and timing depend on the banks, currency and route; check them in advance with your bank.

Structural fields are based on the official SWIFT IBAN Registry. The editorial method and validation boundary are documented on our German editorial page (German).

Overview

CountrySao Tome and Principe (ST)
IBAN length25 characters
FormatSTkk BBBB BBBB BBBB BBBB BBBB B

Visual breakdown

Fictitious format example, not payment data:

ST23000100010051845310146
Country codeCheck digitsBank codeBranch codeAccount numberNational check digit(s)

Character-by-character explanation

SegmentCharactersLengthExplanation
Country codeST2ST for São Tomé and Príncipe (ISO 3166-1)
Check digits232Two check digits per MOD-97
Bank code000144-digit bank code
Branch code000144-digit branch code
Account number005184531011111-digit account number
National check digit(s)4622-digit national check digits

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Frequently asked questions

How do I check the length of an IBAN from Sao Tome and Principe?
Remove spaces and count 25 characters. The first two characters are ST; the remaining positions follow STkk BBBB BBBB BBBB BBBB BBBB B. A different length is formally invalid for this country format.
What do the check digits in a Sao Tome and Principe IBAN mean?
The two check digits are calculated from the complete IBAN using ISO 7064 MOD-97. They help detect format and transcription errors. A passing checksum does not confirm that an account exists or identify its account holder.
What should I do when an IBAN is formally invalid?
Check the country code, character count, letters and digits, and the check digits. Compare the entry with your bank records or ask the bank for the correct IBAN. This checker validates structure and checksum; it does not verify account ownership or payment approval.

IBAN structure for other countries

Germany

22 characters · DEkk BBBB BBBB CCCC CCCC CC

Austria

20 characters · ATkk BBBB BCCC CCCC CCCC

Switzerland

21 characters · CHkk BBBB BCCC CCCC CCCC C

Liechtenstein

21 characters · LIkk BBBB BCCC CCCC CCCC C

France

27 characters · FRkk BBBB BGGG GGCC CCCC CCCC CKK

Spain

24 characters · ESkk BBBB GGGG KKCC CCCC CCCC

Italy

27 characters · ITkk XBBB BBGG GGGC CCCC CCCC CCC

Portugal

25 characters · PTkk BBBB SSSS CCCC CCCC CCCK K