Disclosed is an electronic apparatus. The electronic apparatus includes a communicator comprising communication circuitry, and a processor configured to control the electronic apparatus to, in response to a call request being received through the communicator, transmit CAPTCHA information to an external device that requests the call, and in response to receiving response information about the CAPTCHA information from the external device, identify a counterpart that requests the call based on whether the response information is matched with the CAPTCHA information, and provide information on the identified counterpart.