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The EPP code is just a string of text that is used to verify that you are the actual domain owner when you want to transfer your domain to another company.
The company you used to register your domain will have it so all you have to do is email them and ask them to send it to you.
Then when you sign up for web hosting with us and want to transfer your domain, you will be asked to enter it on the sign up form.
NOTE: EPP is also known as Auth Code.