Black Out Calls


If the receiving party does not have a Kryptotel App, encrypted calls are still possible with our fantastic “Black Out” function, that allows our users to dial/call regular telephone numbers:


  • The call is encrypted and safe up to the interconnection point with the regular telephone network (border gateway.
  • From that point on the calling number is randomly set with a different number for each phone call.
    By continously and automatically changing the calling telephone number it will be impossible for anybody to tap or intercept your telephone, because as said earlier, for every call you will be assigned a different telephone number.
  • Furthermore this number is not linked with your IMEI (International Mobile Equipment Identity) therefore it will be absolutely impossible to trace your identity.
  • The app shows an orange locker to advice you about the partial encryption used because you are calling a normal phone number:


-In order to have an even higher level of security the calls enter the regular telephone network from more than a 100 different interconnection points scattered in all 5 continents together with millions of other calls.

Attention: The “Black out” function does not exclude the possibility of intercepting the number you are calling. In this case the call could be listened to, even though your identity will still not be traceable. This is why we call this function a “BlackOut” it guarantees excellent privacy if you are the target of the interception, but it cannot guarantee the absolute privacy that Kryptotel’s services offer when both parties are using Kryptotel Voip App.

Our cost of calling regular telephone numbers is 30% cheaper than current costs applied by Skype.

In order to call a regular telephone number all you need to do is enter the international country code for the number before dialing the actual number (ex: 001-USA; 0039-Italy; 0044-UK). Example for the USA dial 0013477276828  or +134772726828.