How to support IRCCloud on your network
If you operate an IRC server or network, please allow an increased session limit for connections from the following IP ranges:
|Connection pool hostname||IPv4|
All our IPs have forward and reverse DNS under the
You may wish to simply permit more connections based on reverse DNS lookups.
Each user can be uniquely identified for the purpose of bans, etc. by their ident-verified username,
in the form
uid123 for a free user or
sid456 for a paid subscriber). Users are unable to change their user IDs.
On IPv6, each IRCCloud user connects from their own unique IPv6 address, with forward and reverse DNS entries that look like id-[UID].[POOL_HOST], eg: id-1234.highgate.irccloud.com
If your network supports IPv6 connections, we'll detect any AAAA records exposed in DNS, and favour those by default. This allows us to assign each user a unique IPv6 address, mapped from their user ID, e.g.
This is the preferred way to allow IRCCloud support, since each IRCCloud user connects from their own unique address within our /48 range.
In case of v6 failure, please make sure there are sensible session limits of the v4 IPs too, as IRCCloud will retry connections using IPv4 if IPv6 fails.
Some IRC servers will group a whole IPv6 subnet together for the purposes of session limits (for example, UnrealIRCD by default will consider a whole /64 as one host). If this is the case you will need to configure your server to allow a separate clone limit for each address in our IPv6 subnet.
If any of these arrangements aren't possible on your network, please send a message to james on irc.irccloud.com, or contact us at firstname.lastname@example.org and we can discuss other options. Thanks!