security code

Can Microsoft check what are the accounts that my mobile phone number has been assign for receive a security code? There are Microsoft account security code had been sent to me several time an hour ago which I had not requested for. This kind of situation has happened once 2 - 3 weeks ago and didn't happen again until today. The account that I use now is my only one active account. I am really curious now, please tell me if there are others account that has been assign with my mobile phone number, that might solve the problem.