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IBANforge
Deutsche Bundesbank register

Bankleitzahl 44152370

Sparkasse an der Lippe, Lünen

Bankleitzahl44152370
InstitutionSparkasse an der Lippe
Short nameSparkasse an der Lippe
BICWELADED1LUN
Postcode44530
TownLünen
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.

DE42 4415 2370 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": "WELADED1LUN",
    "bic8": "WELADED1",
    "bank_name": "Sparkasse an der Lippe",
    "city": "Lünen",
    "source": "Deutsche Bundesbank Bankleitzahlendatei",
    "as_of": "2026-10",
    "basis": "national_register",
    "authoritative": true,
    "lei": "529900GP2S6AGVOZ5B71"
  },
  "bank_code_check": {
    "value": "44152370",
    "status": "verified",
    "match": "register",
    "register": "Deutsche Bundesbank Bankleitzahlendatei",
    "authoritative": true,
    "institution": {
      "name": "Sparkasse an der Lippe",
      "street": null,
      "post_code": "44530",
      "town": "Lünen",
      "country": "DE"
    },
    "as_of": "2026-10"
  },
  "sepa": {
    "member": true,
    "vop_required": true
  },
  "issuer": {
    "type": "bank",
    "name": "Sparkasse an der Lippe",
    "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":"DE42441523701000000000"}'

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.