Information and Communications Technology, more specifically, Technology & Programming

Code is typically typed into the Telegram, If you filter out categories which do not relate completely to computing, its multiple text limits and types = no multiple engagement by lots - communications not Social entity! Therefore the category character= "Technology & Programming"

Broadcasting & Communications / Technology & Programming

Communications (This category seems the most specific and relevant as Telegram is a messaging application for communication.)

Communications / Online Communities

Communications - Telegram (which falls under "Entertainment & Media")