https://www.theregister.co.uk/2018/04/17/russia_blocks_google_aws_ip_addresses_to_get_telegram/

Russia's telecoms regulator Roskomnadzor has started blocking IP addresses linked to secure messaging service Telegram.

Russia wants Telegram banished from within its borders, supposedly on national security grounds. First on its list, therefore, according to Servers.ru (translated), are addresses from Amazon Web Services (800,000 of them), and more than a million in the 35.192.0.0/12 subnet – Google's cloud.