Different countries have different procedures for getting an EORI number. Please find that information per EU country below.
An EORI number is a European Union registration and identification number for businesses that want to import or export goods into or out of the EU. An EORI number is assigned by the member state where your company is established. Once you have an EORI number, this number will be valid in all other EU member states.
For more information please see the website of the relevant country, list in alphabetical order below.