Is it safe to during a telephone conversation? Although some it may seem that it is impossible to plan, who will call us, there are ways to monitoring the number what is trying to make a call. Such methods gain fame not only due to numerous advantages, which provides taking care of own safety but more due to simplicity their availability. Individual, who has access to the Internet on a smartphone or laptop can check, who called without a sample. Such strategies are uncomplicated, you don't need to enter any more information apart from here, what number tried to interact with you . These are techniques, what you can apply yourself, but hereby take care of your own safety. Unknown numbers can ringing with different intentions. Sometimes it's just a mistake, but much more often these unidentified, unknown phones ringing for the purposes of for example phishing personal, false offers. By using these services and by entering your personal information, you may have big problems in more time which cannot be solved, if only you check someone's number. What conclusions can be drawn from this? To defend own.