Due to a technical issue, the VIES system is not currently showing VAT registrations from January 1, 2025 onwards, though older registrations are visible. For verification of new registrations, use the Czech domestic VAT Register on the “Moje daně/My taxes” portal or contact the Financial Administration of the Czech Republic directly.
Source: financnisprava.gov.cz
Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.