Look up a company by number

    IČO number search (Czech Republic)

    Free, official, source-cited — updated 2026-06.

    Search Company Records in Czech Republic

    3 free lookups per day. No sign-up required.

    Reviewed by LemReveal Research TeamLast verified June 2026Primary source: ARES

    How do I look up a company by its registration number in Czech Republic?

    Enter the IČO to look up a Czech Republic company directly on ARES. Unlike a name search, an IČO returns exactly one entity, which is why it is the identifier to use for KYC, invoicing and contract checks.

    Step-by-step

    1. 1

      Find the IČO on the paperwork

      The IČO normally appears on invoices, contracts, the website footer or official correspondence. It is the number counterparties are required to quote.

    2. 2

      Search the IČO

      Enter the number exactly as printed. Punctuation and spacing vary between documents — strip them if the search returns nothing.

    3. 3

      Confirm the returned entity

      Check the legal name on the returned record matches the name on your paperwork. A mismatch between quoted number and quoted name is a serious warning sign.

    4. 4

      Verify at ARES

      For anything contractual, confirm the number against the primary source at https://ares.gov.cz.

      https://ares.gov.cz
    Open ARESAll Czech Republic records

    Frequently asked questions

    What is a IČO in Czech Republic?

    It is the identifier ARES assigns to a registered entity. It stays with the entity even if the trading name changes, which makes it the reliable way to track a company over time.

    Is a IČO lookup free?

    Yes. Looking up a company by IČO on ARES is free and requires no account.

    What if the IČO returns no result?

    Re-enter it without spaces or punctuation first. If it still returns nothing, the number may be mistyped, belong to a different country's register, or not exist — ask the counterparty to confirm it in writing.

    Should I use the IČO or the company name?

    The IČO. Names are duplicated across entities within a group; the number is unique to one entity.

    What is an IČO?

    IČO (Identifikační číslo osoby) is an 8-digit identification number assigned to every economic subject in the Czech Republic. It's the primary identifier for all business interactions with government and other businesses.

    People also ask about look up a company by its registration number in Czech Republic

    The exact questions searchers type into Google — answered from the primary source.

    Is the Czech Republic company register free to search?

    Yes. Basic company lookups on the ARES are free — you can search by company name or registration number, view legal status, registered address and (usually) directors at no cost. Some jurisdictions charge a small fee only for downloading full filed documents.

    What is the official Czech Republic business registry?

    The ARES is the official public register of companies incorporated in Czech Republic. It is operated by the government and is the primary source cited on this page — https://ares.gov.cz.

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