diff --git a/src/coremods/core_extra.rs b/src/coremods/core_extra.rs
index ef5d669..11bfe40 100644
--- a/src/coremods/core_extra.rs
+++ b/src/coremods/core_extra.rs
@@ -99,7 +99,7 @@ impl Command for List {
     }
     fn handle(&self, s: &mut Server, uid: Uid, _params: &[String]) -> CmdResult {
         s.numeric(uid, RPL_LISTSTART, "Channel :Users Name");
-        let auspex = crate::modules::opertypes::has_priv(s, uid, "channels/auspex");
+        let auspex = crate::modules::opertypes::has_priv(s, uid, crate::modules::opertypes::privs::CHANNELS_AUSPEX);
         let keys: Vec<String> = s.channels.keys().cloned().collect();
         for key in keys {
             let ch = &s.channels[&key];
diff --git a/src/coremods/core_info.rs b/src/coremods/core_info.rs
index 22fbfa5..dcde286 100644
--- a/src/coremods/core_info.rs
+++ b/src/coremods/core_info.rs
@@ -178,8 +178,8 @@ impl Command for Whois {
         };
         let asker_oper = s.is_oper(uid);
         // auspex: see through user privacy (real host+IP, geo) / channel privacy (secret chans)
-        let asker_auspex_u = crate::modules::opertypes::has_priv(s, uid, "users/auspex");
-        let asker_auspex_c = crate::modules::opertypes::has_priv(s, uid, "channels/auspex");
+        let asker_auspex_u = crate::modules::opertypes::has_priv(s, uid, crate::modules::opertypes::privs::USERS_AUSPEX);
+        let asker_auspex_c = crate::modules::opertypes::has_priv(s, uid, crate::modules::opertypes::privs::CHANNELS_AUSPEX);
         let is_self = tuid == uid;
         // hidewhois: hide sensitive lines from ordinary users (opers/self exempt per config)
         let hide = crate::modules::hidewhois::hide(s, uid, tuid, asker_oper);
@@ -477,8 +477,8 @@ impl Command for Who {
         let asker_oper = s.is_oper(uid);
         // auspex: reveal secret/private channel members (channels/auspex) and +i users
         // who share no channel with the asker (users/auspex)
-        let asker_auspex_u = crate::modules::opertypes::has_priv(s, uid, "users/auspex");
-        let asker_auspex_c = crate::modules::opertypes::has_priv(s, uid, "channels/auspex");
+        let asker_auspex_u = crate::modules::opertypes::has_priv(s, uid, crate::modules::opertypes::privs::USERS_AUSPEX);
+        let asker_auspex_c = crate::modules::opertypes::has_priv(s, uid, crate::modules::opertypes::privs::CHANNELS_AUSPEX);
         let multi = s
             .users
             .get(&uid)
diff --git a/src/link.rs b/src/link.rs
index fde3e03..01d77ec 100644
--- a/src/link.rs
+++ b/src/link.rs
@@ -265,13 +265,6 @@ impl Server {
             .is_some_and(|ru| self.server_is_service(&ru.sid))
     }
 
-    /// Whether the user reachable by this nick is a network service.
-    pub fn nick_is_service(&self, nick: &str) -> bool {
-        self.remote_nick
-            .get(&nick.to_ascii_lowercase())
-            .is_some_and(|uuid| self.uuid_is_service(uuid))
-    }
-
     fn link_server(&mut self, uid: Uid, msg: &Message) {
         if msg.params.len() < 4 {
             self.reject_link(uid, "Not enough SERVER parameters");
diff --git a/src/modules/customprefix.rs b/src/modules/customprefix.rs
index 8f0d1ae..3c06dab 100644
--- a/src/modules/customprefix.rs
+++ b/src/modules/customprefix.rs
@@ -144,19 +144,6 @@ pub fn def_for_letter(c: char) -> Option<&'static PrefixDef> {
     custom_defs().iter().find(|d| d.letter == c)
 }
 
-/// The prefix mode letter for a sigil char (FJOIN decode); `' '` if none.
-pub fn letter_for_sigil(c: char) -> char {
-    let cs = c.to_string();
-    if let Some(i) = (0..6).find(|&i| sigil(i) == cs) {
-        return LETTERS[i];
-    }
-    custom_defs()
-        .iter()
-        .find(|d| d.sigil == cs)
-        .map(|d| d.letter)
-        .unwrap_or(' ')
-}
-
 fn builtin_index(letter: char) -> Option<usize> {
     LETTERS.iter().position(|&l| l == letter)
 }
diff --git a/src/modules/opertypes.rs b/src/modules/opertypes.rs
index 96f2965..bc62496 100644
--- a/src/modules/opertypes.rs
+++ b/src/modules/opertypes.rs
@@ -116,11 +116,6 @@ impl Module for OperTypes {
     }
 }
 
-/// The WHOIS title of a typed oper, if any (used in the denial message).
-pub fn title_of(s: &Server, uid: Uid) -> Option<String> {
-    s.users.get(&uid).and_then(|u| u.ext.get::<OperType>()).map(|t| t.title.clone())
-}
-
 /// The formatted WHOIS special line for a typed oper, if any — "is a/an <title>",
 /// bold + the type's colour (mIRC code, e.g. 4 = red) so it stands out. core_info
 /// emits it on its own 320 line.
diff --git a/src/modules/snoop.rs b/src/modules/snoop.rs
index ec32938..97184e8 100644
--- a/src/modules/snoop.rs
+++ b/src/modules/snoop.rs
@@ -98,7 +98,7 @@ impl Module for Snoop {
         let full = format!("{head}{ip_full}{port_seg}{trans}{geo_full}{tail}");
         let redacted = format!("{head}{ip_red}{port_seg}{trans}{geo_red}{tail}");
         srv.snotice_c_gated('c', &full, &redacted, |u| {
-            crate::modules::opertypes::user_has_priv(u, "users/auspex")
+            crate::modules::opertypes::user_has_priv(u, crate::modules::opertypes::privs::USERS_AUSPEX)
         });
     }
     fn on_join(&mut self, srv: &mut Server, uid: Uid, chan: &str) {