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IBANforge
Deutsche Bundesbank register

Bankleitzahl 30040099

Commerzbank Gf Comp. Center STS, Düsseldorf

Bankleitzahl30040099
InstitutionCommerzbank Gf Comp. Center STS
Short nameCommerzbank Gf Comp.Center
BICCOBADEFFSTS
Postcode40213
TownDüsseldorf
Statusactive
Successor BLZnone

IBAN structure with this code

A German IBAN is DE, two check digits, the eight-digit Bankleitzahl, then the ten-digit account number. The BLZ is what the register can vouch for; the account number is known only to the bank.

DE86 3004 0099 1000 0000 00

Synthetic example: the account part is a placeholder, this IBAN belongs to nobody. It shows where the code sits inside the IBAN.

What the API answers for this code

The block below is the route's own answer, produced by the same code that serves api.ibanforge.com, on the register as of the date shown. Nothing is edited.

{
  "valid": true,
  "bic": {
    "code": "COBADEFFSTS",
    "bic8": "COBADEFF",
    "bank_name": "Commerzbank Gf Comp. Center STS",
    "city": "Düsseldorf",
    "source": "Deutsche Bundesbank Bankleitzahlendatei",
    "as_of": "2026-10",
    "basis": "national_register",
    "authoritative": true,
    "lei": null
  },
  "bank_code_check": {
    "value": "30040099",
    "status": "verified",
    "match": "register",
    "register": "Deutsche Bundesbank Bankleitzahlendatei",
    "authoritative": true,
    "institution": {
      "name": "Commerzbank Gf Comp. Center STS",
      "street": null,
      "post_code": "40213",
      "town": "Düsseldorf",
      "country": "DE"
    },
    "as_of": "2026-10"
  },
  "sepa": {
    "member": true,
    "vop_required": true
  },
  "issuer": {
    "type": "bank",
    "name": "Commerzbank Gf Comp. Center STS",
    "classification": "default"
  },
  "risk_indicators": {
    "country_risk": "standard",
    "sepa_reachable": true,
    "vop_coverage": true,
    "test_bic": false
  }
}

Get this answer from your own software

The IBANforge API checks an IBAN and names the bank behind it, with its BIC when one is known, reading national registers such as the one on this page. Two ways to start without paying:

Keyless trial

Send an IBAN to POST /v1/iban/validate with no key at all, up to 25 times a week, on that route only. With this page’s example IBAN:

curl -X POST https://api.ibanforge.com/v1/iban/validate \
  -H "Content-Type: application/json" \
  -d '{"iban":"DE86300400991000000000"}'

Free key

200 requests a month on every endpoint once you add an e-mail address and confirm the code sent to it. With no address and no card, it starts at 25 requests a month, straight away.

Other codes of the same institution

Check an IBAN in the playgroundAudit a whole creditor fileGerman bank codes (Bankleitzahlen)

Source: Deutsche Bundesbank Bankleitzahlendatei, register as of 2026-10.