How can you tell if someone is on telegram?

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Tags

1. #check
2. #conversation
3. #sending
4. #appear
5. #other
6. #opened
7. #marks
8. #group
9. #chats
10. #telegram
11. #signifies
12. #notified
13. #means
14. #these
15. #message
16. #person
17. #party
18. #delivered
19. #clock