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IBANforge
SIX BankMaster

IID 08373

China Construction Bank Corporation, Beijing, Swiss Branch, Zürich

IID / BC-Nummer08373
InstitutionChina Construction Bank Corporation, Beijing, Swiss Branch
Institution typebank
IID typeheadquarters
Headquarters IID08373
SeatBeethovenstrasse 33, 8002 Zürich
BICPCBCCHZZXXX
Payment servicesSIC · RTGS CHF · Instant Payments CHF · euroSIC
SIC IID083731
QR-IIDnone
Valid on2026-10-02

IBAN structure with this code

A Swiss IBAN is CH, two check digits, the five-digit IID, then a twelve-digit account part. When the institution holds a QR-IID, the QR-IBAN of a QR-bill carries that number in the same position.

CH63 0837 3000 0000 0000 1

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.

{
  "iid": "08373",
  "found": true,
  "institution": {
    "name": "China Construction Bank Corporation, Beijing, Swiss Branch",
    "type": "bank",
    "iid_type": "headquarters",
    "headquarters_iid": "08373"
  },
  "address": {
    "street": "Beethovenstrasse",
    "building_number": "33",
    "post_code": "8002",
    "town": "Zürich",
    "country": "CH"
  },
  "bic": "PCBCCHZZXXX",
  "payment_services": {
    "sic": true,
    "rtgs_chf": true,
    "instant_payments_chf": true,
    "eurosic": true,
    "lsv_bdd_chf": false,
    "lsv_bdd_eur": false
  },
  "sic_iid": "083731",
  "qr_iid": null,
  "qr_iid_source": null,
  "valid_on": "2026-10-02"
}

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":"CH6308373000000000001"}'

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.

Check an IBAN in the playgroundAudit a whole creditor fileSwiss clearing numbers (IID / BC-Nummer)

Source: SIX BankMaster, register as of 2026-10-02.