The service was created in 2011 in the Czech Republic. It is an online forum where the users can share their experience with phone numbers, both annoying (mostly telemarketing, surveys) and useful (e.g. couriers, offices)..
Since the beginning, the service has been received very well, which led to localization into more languages. Nowadays, the forum exists in more than 20 languages and 34 countries throughout the world.
The service is intended for anyone who wants to identify the owner of an unknown phone number. The creators of the forum have also recently created the mobile app Call Insider for Android phones. This app, which is connected to the database of the website reverse-lookup.co.uk, also allows users to automatically block telemarketing numbers.
a man named Larry Hall called to say I had won second prize in the American Sweepstakes Circle and that they would be delivering $525,000 in cash by Brinks truck to my home. Just had to send them $5250 for temporary insurance on the delivery. Then he called back to say that there had been a mistake and the prize was actually $5,000,000 and I would need to send$17,000 to guarantee delivery. I get multiple calls and they tell me not to say anything to anybody about my winning.