OT: How to get customer number

Hi I'm having trouble locating my customer number. I am sure that i registered at least two SuSE versions (6.1 and 6.2) . I can't remember if I ever get response from SuSE after I sent registration cards. Is there a web adres where i can enter my e-mail(s) and get an e-mail with customer number or something like that? Tnx in advance .. Best regards Emir