I receive numerous calls from +1 786-565-4821 to my temporary overseas number which is associated with a WhatsApp account. I believe it has something to do with WhatsApp authentication or attempts at re-authorization for continued NSA surveillance.
me too received call from same no.and computer voice told some verification code.i received sms also
that shows u can also tap on this link to verify ur phone :v.whatsapp.com/470632,480556
iam in south India,