Does any know how to identify a pc to cell text user by their identifier number that states who it is from?

Question

For example, if I am logged in and use my pc to IM someones cell they do not see my typical user name but a number that has been assigned to me for this purpose. If I do not know who is sending my phone a message this way, is there a mean to identify this individual? Thanks!

Answer 1

Yes, it's ez

Answer 2

n

Answer 3

so