What is the ruling on using programs that provide virtual numbers for registering in applications such as Telegram and WhatsApp, given that it is not known whether these numbers belong to other people?

It is not permissible to use virtual numbers to access websites if doing so violates their terms and conditions, especially if there is a fear that these numbers might belong to others. Intellectual property rights are protected, and it is not permissible to infringe upon them. It is not permissible to use programs in a way that violates the terms of their owners, or leads to the infringement of the rights of their users, or spies on them.