If for whatever reason you have the need to reroute or block Telegram Messenger traffic, at some point, you would have come across an ASN list with a list of /22 IPv4 blocks and one or two /48 IPv6 blocks. If you’ve hastily based your firewall rules on that list, you’ll notice it works only intermittently. That’s because the list is incomplete. JTT got you covered and you have come to the right place! Below are the known CIDR used by the Telegram Messenger service:
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The official Telegram CIDR list
