How can I add phone numbers to contacts through a loop?

Question

Mobile devices

The bottom line is, I need to find out the person’s phone number, I don’t know 4 digits from his number + I know that he has a telegram account linked to this number. You can go through all the possible options by adding them to your contacts and through telegrams in contacts you can see if this same person is there. Is it possible to automate this business without manually adding numbers to your phone (Samsung)?