Registries record applicant details in a public database called WHOIS. You can check Whois information especially for the registrant (domain owner).
For a few domains registered with EuroDNS local partners, check inside your EuroDNS account (details panel) and contact your Reseller if you don't manage your domain(s) yourself with your owned EuroDNS account.
Note: your WHOIS data could not match sometimes with the details filled during the registration process for the following reasons:
- most registries hide WHOIS data (organization contact, email addresses, billing)
- process automation in order to reduce registration delay