Alternative Telegram Clients (Desktop): , like Kotatogram Desktop, may display user IDs in the details of their profiles, chats, channels, or bots.
Using the Telegram API (for developers): If you are a developer using the Telegram Bot API, you can retrieve a user's ID once they interact with your bot. The update.message.from_user.id thailand telegram mobile phone number list attribute in Python Telegram Bot Library, for example, provides the user's ID. However, you cannot directly get an ID from just a username without prior interaction.
Important Considerations:
Privacy: Telegram prioritizes user privacy. Directly obtaining a user's ID without their interaction or consent is generally not possible through bots.
Usernames vs. IDs: Remember that a username (username) is a public alias that users can choose, while the User ID is a unique numerical identifier assigned by Telegram. Usernames can be changed, but User IDs remain constant.
Bot Limitations: Bots operate within the permissions granted by the Telegram API. They cannot bypass users' privacy settings.
In summary, while there isn't a single "magic" bot to find any Telegram ID from just a username, the bots mentioned above can help you find your own ID and the IDs of groups and channels, as well as potentially the IDs of other users if they interact with the bot or haven't restricted forwarding information.