I don't think there's a complete list anywhere. So here's a pretty big one. rust - Rust 24-hour partyline rust-internals - Compiler hackers rustc - Focused discussion on rustc internals rust-libs - Focused discussion on rust std libs rust-bots - Status updates cargo - Anything about Cargo ser…

There is also the #rust-docs channel

@brson what is the current status after recent Freenode incident?

I’m told the ##rust channel has migrated from freenode to the new irc.libera.chat network.

A list of Rust IRC channels

tomaka February 25, 2015, 9:54pm 2

There's also piston-internals

Topic		Replies	Views
Announcing the #rust-docs channel announcements	0	855	October 6, 2015
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Rust Group and Channel for Iranian in Telegram Messenger community	0	659	July 18, 2018