Is it possible to add a link to a group in Telegram in href?

Question

HTML

For example, on a mobile device, when clicking on the link 123-456-789 , the user will be prompted to call the specified number (on a desktop, skype may start).
By clicking on Text me! - the mail client will open.
The question is whether it is possible, having a phone number (or what else is needed) of a telegram account, when clicking on a link to open an application in the corresponding group.

Answer 1

<a href="telegram.me/@groupname">

Answer 2

Thanks for the tip. One note for the community, this is how it <a href="https://telegram.me/groupname"></a>worked for me

Answer 3

To go to the dialog with the user:
To go to the chat (the link to the chat invitation is generated in the group settings. Copy everything that comes after ...joinchat/):

<a href="tg://join?invite=invite_link">Join Group</a>