Custom tools
Praha, CZ
IČO · VAT ID · address

Czech company lookup (ARES).

The tool looks up a Czech company or sole trader in ARES, the public register of the Czech Ministry of Finance, by company ID (IČO) or name. It shows the registered name, address, VAT ID, legal form and founding or dissolution date. The IČO is checksum-verified first, so typos show up at once. One click copies everything to an invoice.

Data from the public ARES register of the Czech Ministry of Finance. The IČO is checksum-verified first.

How to use it

03
  1. Step01

    Enter the IČO or name

    An IČO can have fewer than 8 digits; zeros are added on the left.

  2. Step02

    Check the details

    Mainly the registered address and VAT ID, which belong on an invoice.

  3. Step03

    Copy or create an invoice

    Paste the details into your accounting, or straight into our invoice generator.

When it’s useful

  • Invoicing. The correct registered name, address and VAT ID of the customer.
  • A new supplier. A quick check that the company exists, when it was founded and that it hasn’t been dissolved.
  • An enquiry. Enriching the details of a company that contacted you. We can also automate that.

Where the data comes from

From the official ARES interface (ares.gov.cz). The data is as current as the register keeps it. For legal acts, always rely on an extract from the commercial or trade register.

FAQ04

Questions people ask

01What is ARES?

The Administrative Register of Economic Subjects, run by the Czech Ministry of Finance. It combines data from the commercial register, trade register and others. It's public and free.

02How do I know an IČO is valid?

An IČO has eight digits and the last is a check digit. The tool recalculates it before asking the register. If it doesn't match, it's almost certainly a typo.

03Why is the VAT ID missing for a company?

ARES shows VAT IDs mainly for registered VAT payers. If it's missing, the company probably isn't a VAT payer, or the record isn't in the register yet. Check VAT status with the VAT number validator via the EU VIES system.

04Do you store what I search?

No. The query passes through our server only so the browser can send it to ARES. We cache the result briefly and store nothing about you.

Next step01

What next

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