As with most instant messaging protocols, other than XMPP, Telegram makes use of centralized servers. Telegram Messenger LLP has servers in the number of countries all through the entire world to improve the response time of their provider. 3rd-party services determine which way your verification codes are sent – and https://medium.com/@w3moz/telegram-a-simple-guide-to-a-powerful-messaging-app-e1d4dcc11a10?postPublishedType=initial