This number first called my phone at 10am 13/01/2014. There was no voicemail left and I didn't pick up the call. Since 10am it has phoned a further 4 times. Curiosity got the better of me, so I pressed redial, my phone then told me that the number is not in use! Since then, this number (though supposedly "not in use") has phoned another 2 times. I do not intend to answer it should it ring again, it does seem suspicious.