We receive a bank account statement from a supplier or an association, and the first five digits displayed are 30003. Before validating a transfer, we want to know which institution this code corresponds to, especially since several banking brands have merged in recent years. The bank code 30003 identifies SG, formerly Société Générale, including agencies from the Crédit du Nord network since the merger of 2023-2024.
Bank code 30003 and SG-Crédit du Nord merger: what has changed on bank statements
Until 2023, the bank code 30003 exclusively referred to the historical Société Générale. Crédit du Nord used the code 30076, Banque Courtois used 30438, and each regional subsidiary had its own identifier. Since the creation of the unified SG brand between 2023 and 2025, these codes have been gradually replaced by the bank code 30003.
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In practice, a former Crédit du Nord customer can now receive a new bank account statement bearing the code 30003, without having changed banks in the commercial sense. The account holder now displays “SG” followed by the name of the agency, whether it was historically Société Générale or formerly Crédit du Nord.
To understand in detail what the bank code 30003 is and find the associated institution, one can also refer to the official list maintained by the Banque de France, which assigns interbank codes to each credit institution.
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The continuity of transfers is ensured by SEPA redirection mechanisms: a transfer issued to an old Crédit du Nord IBAN (code 30076) is redirected to the new SG IBAN (code 30003) during a transition period. Therefore, there is no need to urgently cancel direct debits or mandates, but updating bank details remains necessary in the long term to avoid any rejections after the end of the redirection.
Reading the code 30003 on a bank statement and in a French IBAN
The bank code occupies the first five digits of the bank account statement. On an SG bank statement, it reads from left to right:
- Positions 1 to 5 correspond to the bank code (30003 for SG)
- Positions 6 to 10 indicate the branch code, specific to the agency managing the account
- Positions 11 to 21 form the individual account number
- Positions 22 and 23 constitute the RIB key, an arithmetic consistency check
In the French IBAN, the bank code also appears, but shifted. After the country prefix “FR” and the two control digits, the same five digits 30003 are found. The IBAN merely encapsulates the bank account statement in a standardized international format.
Quickly verifying a bank code
When we receive an IBAN by email or on an invoice, extracting the bank code allows us to confirm the recipient institution before validating a payment. It is a useful reflex against fraud involving changes to bank details. If the bank code does not match the bank announced by the beneficiary, we suspend the transfer and verify through another channel.
SG, LCL, BNP Paribas bank codes: comparison benchmarks
The bank code is assigned by the Banque de France. Each French credit institution has a unique five-digit code. To locate 30003 among the main players:
- 30003: SG (Société Générale), now including former Crédit du Nord subsidiaries
- 30002: LCL (Le Crédit Lyonnais)
- 30004: BNP Paribas
- 10107: BRED Banque Populaire
- 11315: Caisse d’Épargne CEPAC
It is noted that the major historical networks have close codes (30002, 30003, 30004), a legacy of the sequential assignment by the Banque de France. Cooperative and regional banks have more dispersed codes in the numbering.
Practical cases where the code 30003 raises questions
Migration from a former Crédit du Nord account
If one held a Crédit du Nord account before the merger, the transition to code 30003 may have created confusion with direct debit organizations (insurances, subscriptions, taxes). The priority step is to provide the new SG bank account statement to each creditor before the end of the SEPA redirection period. Feedback varies on this point: some customers report an automatic switch without action on their part, while others had to manually follow up with their creditors.
Anti-fraud verification on a transfer
We receive an invoice with a bank account statement starting with 30003 while the provider claims to be with another bank. This is a warning signal. The code 30003 exclusively refers to the SG group. If the beneficiary announces another brand, it is necessary to verify by phone before validating the payment.
Opening an account in a neobank
Neobanks and payment institutions do not use traditional bank codes in the same way. The code 30003 can only appear on an account domiciled at SG. If this code is seen on a bank account statement supposedly issued by another type of institution, it is an inconsistency to report.
The bank code 30003, once exclusive to Société Générale, now covers the entire SG network, including former Crédit du Nord clients. Verifying these five digits on a bank account statement remains the first reflex to ensure that a transfer is indeed going to the correct institution, especially during a time when bank mergers are reshuffling the identifiers.