May I know the number of the person who wrote to me in the telegram?

If this person is a stranger and you have not saved their number in the contact list, there is no program that will know the phone number of the person who wrote to you directly. The easiest way is to "Send your number" in a chat to the person who wrote it, if he writes any answer, his number should also come to you (I read it on Internet forums, I have not tried it myself). Of course if spam clicks and doesn’t get blacklisted.

The next method is difficult, but closer to reality. User information collection. He will have indicated his name or username in the telegram. You can google that information and try to figure it out. For example, its username @uniqueusername if from google uniqueusername tashkent or unique faceername facebook can be found by typing Sometimes this method works. Once you have identified him, you can find his profile number.

If it is a face, you can add it to a chat, write it on behalf of another person (for example, a girl), speak, and get the number. Last hope - available 10⁹ try to find out if it corresponds to a number (in general, it is much less if in fact some laws are taken into account, for example, the code 93 ucell does not start with the number 7). But I didn't know if it was legal, it's better to put it in the closet and forget about it. Who is many, many fools.