diff --git a/src/renderer/src/components/AccountsPanel.tsx b/src/renderer/src/components/AccountsPanel.tsx
index 978235e..566c5e8 100644
--- a/src/renderer/src/components/AccountsPanel.tsx
+++ b/src/renderer/src/components/AccountsPanel.tsx
@@ -3,6 +3,7 @@ import { Icon, IconButton, MaskIcon } from './Icon'
 import { MatrixAccountTools } from './MatrixAccountTools'
 import { useChat, usePref, useStore } from '../state/hooks'
 import { bufferDisplayName, resolveMediaUrl, serviceIcon, serviceLabel } from '../lib/util'
+import { IRC_NETWORKS, ircNetworkFor } from '../lib/networks'
 import type { Account } from '../../../shared/wire'
 
 const ADDABLE = ['irc', 'discord', 'sockchat', 'matrix'] as const
@@ -380,6 +381,32 @@ function IrcForm({ onDone }: { onDone: () => void }): JSX.Element {
           <span className="small muted">Nickname</span>
           <input className="text-field" value={nick} onChange={(e) => setNick(e.target.value)} />
         </label>
+        {/* Typing a hostname and port correctly is the one step here where a
+            small mistake looks like the server being down, so the networks
+            people actually join are offered ready-made. Choosing one fills
+            the fields rather than hiding them: they stay editable, and a
+            network not on the list is typed in exactly as before. */}
+        <label className="field">
+          <span className="small muted">Network</span>
+          <select
+            className="text-field"
+            value={ircNetworkFor(host)?.id ?? ''}
+            onChange={(e) => {
+              const n = IRC_NETWORKS.find((x) => x.id === e.target.value)
+              if (!n) return
+              setHost(n.host)
+              setPort(String(n.port))
+              setSsl(n.tls)
+            }}
+          >
+            <option value="">Other…</option>
+            {IRC_NETWORKS.map((n) => (
+              <option key={n.id} value={n.id}>
+                {n.name}
+              </option>
+            ))}
+          </select>
+        </label>
         <label className="field">
           <span className="small muted">Server</span>
           <input
diff --git a/src/renderer/src/components/ServerRail.tsx b/src/renderer/src/components/ServerRail.tsx
index fdc8fce..01ff5ff 100644
--- a/src/renderer/src/components/ServerRail.tsx
+++ b/src/renderer/src/components/ServerRail.tsx
@@ -3,6 +3,7 @@ import { ContextMenu, useContextMenu } from './ContextMenu'
 import { Icon, IconButton, MaskIcon } from './Icon'
 import { Avatar } from './Avatar'
 import { LeaveConfirm } from './LeaveConfirm'
+import { ircNetworkFor } from '../lib/networks'
 import { useChat, usePref, useStore } from '../state/hooks'
 import { bufferDisplayName, classes, nickColor, resolveMediaUrl, serviceIcon } from '../lib/util'
 import {
@@ -92,6 +93,19 @@ function GroupFace({ group, customIcon }: { group: RailGroup; customIcon?: strin
     return <img className="rail-mark" src={service.mark} alt="" />
   }
   if (group.kind === 'account') {
+    // A known IRC network gets its own colour and letters rather than the
+    // same generic "#" every network would otherwise share - which is the
+    // one thing the rail exists to avoid. Initials rather than logos: those
+    // belong to the networks that own them, and a wrong-looking copy of
+    // somebody's logo is worse than two clean letters.
+    const network = group.service === 'irc' ? ircNetworkFor(group.name) : null
+    if (network) {
+      return (
+        <span className="rail-initials" style={{ color: network.colour }}>
+          {network.mark}
+        </span>
+      )
+    }
     return service.mark ? <MaskIcon src={service.mark} size={22} /> : <Icon name={service.glyph!} size={22} />
   }
   return (
diff --git a/src/renderer/src/lib/networks.ts b/src/renderer/src/lib/networks.ts
new file mode 100644
index 0000000..d8fb849
--- /dev/null
+++ b/src/renderer/src/lib/networks.ts
@@ -0,0 +1,52 @@
+/**
+ * The IRC networks somebody is actually likely to be joining.
+ *
+ * Typing a hostname and a port correctly is the one step of adding an IRC
+ * account where a small mistake looks like the server being down, so the
+ * common ones are offered ready-made. Deliberately short: this is a shortcut
+ * for the networks people use, not a directory - "Other" is always there and
+ * is what every network not on the list uses.
+ *
+ * Colours are the network's own where it has a recognisable one, and are used
+ * to tell one server tile from another in the rail. Marks are initials rather
+ * than logos: those belong to the networks that own them, and a wrong-looking
+ * copy of somebody's logo is worse than two clean letters.
+ */
+export interface IrcNetwork {
+  id: string
+  name: string
+  host: string
+  port: number
+  tls: boolean
+  /** Two characters at most, for the rail tile. */
+  mark: string
+  colour: string
+}
+
+export const IRC_NETWORKS: IrcNetwork[] = [
+  { id: 'libera', name: 'Libera.Chat', host: 'irc.libera.chat', port: 6697, tls: true, mark: 'Li', colour: '#7f4bd8' },
+  { id: 'oftc', name: 'OFTC', host: 'irc.oftc.net', port: 6697, tls: true, mark: 'OF', colour: '#2f7fbf' },
+  { id: 'rizon', name: 'Rizon', host: 'irc.rizon.net', port: 6697, tls: true, mark: 'Ri', colour: '#c94f4f' },
+  { id: 'quakenet', name: 'QuakeNet', host: 'irc.quakenet.org', port: 6667, tls: false, mark: 'QN', colour: '#d08a2a' },
+  { id: 'efnet', name: 'EFnet', host: 'irc.efnet.org', port: 6697, tls: true, mark: 'EF', colour: '#4c8f6b' },
+  { id: 'undernet', name: 'Undernet', host: 'irc.undernet.org', port: 6697, tls: true, mark: 'UN', colour: '#3f6fa8' },
+  { id: 'snoonet', name: 'Snoonet', host: 'irc.snoonet.org', port: 6697, tls: true, mark: 'Sn', colour: '#e06a3a' },
+  { id: 'hackint', name: 'hackint', host: 'irc.hackint.org', port: 6697, tls: true, mark: 'hi', colour: '#5f9ea0' }
+]
+
+/**
+ * The network a hostname belongs to, or null.
+ *
+ * Matched on the registrable part of the host rather than the whole thing,
+ * since a network answers on many names - irc.libera.chat, but also
+ * ipv6.libera.chat and any number of round-robin aliases.
+ */
+export function ircNetworkFor(host: string): IrcNetwork | null {
+  const h = host.toLowerCase().replace(/:\d+$/, '')
+  return (
+    IRC_NETWORKS.find((n) => {
+      const domain = n.host.split('.').slice(-2).join('.')
+      return h === n.host || h.endsWith(`.${domain}`) || h === domain
+    }) ?? null
+  )
+}