Is it safe to during a telephone conversation? But particular it may seem that it is impossible to design who will call us, there are ways to controlling the number what is trying to call us. These methods gain fame not exclusively due to numerous benefits, which gives taking care of own safety but additionally due to simplicity their availability. Anyone, who has access to the Internet on a smartphone or laptop can check, who called without a sample. These methods are easy, you don’t need to enter any more information apart from this, what number tried to interact with you . These are techniques, what you can apply yourself, but this take care of your safety. Unknown numbers can ringing with different ideas. Sometimes it’s just a mistake, but much more often these unidentified, unknown phones ringing for the purposes of for example phishing personal, fraudulent offers. By using these services and by entering your personal information, you may have big problems in later time which cannot be solved, if only you check someone’s number. What conclusions can be drawn from this? To defend own.