Automatic identification and blocking method of spam cell

A method of visually or auditorily indicating spam status or a spam class for a calling number through a called terminal, comprising the steps of:

• the destination switching system, which has received a spam call from a spam sender, requesting service from a spam call blocking server by delivering the calling number and a called number to the spam call blocking server;
• the spam call blocking server, which has received the request for service, inquiring about spam status or a spam class for the calling number using the calling number and the called number;
• if the spam status is ‘blocked’, or if the spam status is ‘blocked’ and the spam class is equal to or higher than a predetermined class, the spam call blocking server transmitting the spam status or spam class to the service control system;
• the service control system activating caller identification service of a called party;
• after the activation, the service control system including information about the spam status or spam class in caller identification information for the caller identification service;
• the service control system transmitting call connection information and the caller identification information to a destination switching system and, thus, the destination switching system making a call with a called terminal;
• and
• the destination switching system delivering the caller identification information to the destination terminal and, thus, providing visual or auditory display corresponding to the spam status or spam class through the called terminal.