diff --git a/crates/weaver-app/src/lib.rs b/crates/weaver-app/src/lib.rs
index 593082f..72a58ee 100644
--- a/crates/weaver-app/src/lib.rs
+++ b/crates/weaver-app/src/lib.rs
@@ -53,6 +53,11 @@ use crate::{
     subdomain_app::{extract_subdomain, lookup_subdomain_context},
 };
 
+/// Reserved subdomains that should not be used for notebooks.
+const RESERVED_SUBDOMAINS: &[&str] = &[
+    "www", "api", "admin", "app", "auth", "cdn", "alpha", "beta", "staging", "index",
+];
+
 #[derive(Debug, Clone, Routable, PartialEq)]
 #[rustfmt::skip]
 pub enum Route {
@@ -179,6 +184,13 @@ pub fn App() -> Element {
                     );
                     return None;
                 };
+
+                // Check if subdomain is reserved
+                if RESERVED_SUBDOMAINS.contains(&subdomain.as_str()) {
+                    tracing::info!(subdomain, "Reserved subdomain, skipping notebook lookup");
+                    return None;
+                }
+
                 // Look up notebook by global path
                 let result = lookup_subdomain_context(&fetcher, &subdomain).await;
                 if result.is_none() {
diff --git a/crates/weaver-app/src/main.rs b/crates/weaver-app/src/main.rs
index 4dfaf4d..2148d8f 100644
--- a/crates/weaver-app/src/main.rs
+++ b/crates/weaver-app/src/main.rs
@@ -118,57 +118,3 @@ fn main() {
     #[cfg(not(feature = "server"))]
     dioxus::launch(App);
 }
-
-/// Extract subdomain from host if it matches base domain pattern.
-#[cfg(feature = "server")]
-fn extract_subdomain<'a>(host: &'a str, base: &str) -> Option<&'a str> {
-    let suffix = format!(".{}", base);
-    if host.ends_with(&suffix) && host.len() > suffix.len() {
-        Some(&host[..host.len() - suffix.len()])
-    } else {
-        None
-    }
-}
-
-/// Look up notebook by global path.
-///
-/// Returns SubdomainContext if a notebook with publishGlobal=true exists for this path.
-#[cfg(feature = "server")]
-async fn lookup_global_notebook(
-    fetcher: &Arc<fetch::Fetcher>,
-    path: &str,
-) -> Option<SubdomainContext> {
-    use jacquard::IntoStatic;
-    use jacquard::smol_str::SmolStr;
-    use jacquard::smol_str::ToSmolStr;
-    use jacquard::types::string::Did;
-    use jacquard::xrpc::XrpcClient;
-    use weaver_api::sh_weaver::notebook::resolve_global_notebook::ResolveGlobalNotebook;
-
-    let request = ResolveGlobalNotebook::new().path(path).build();
-
-    match fetcher.send(request).await {
-        Ok(response) => {
-            let output = response.into_output().ok()?;
-            let notebook = output.notebook;
-
-            let owner = notebook.uri.authority().clone().into_static();
-            let rkey = notebook.uri.rkey()?.0.to_smolstr();
-            let notebook_path = notebook
-                .path
-                .map(|p| SmolStr::new(p.as_ref()))
-                .unwrap_or_else(|| SmolStr::new(path));
-
-            Some(SubdomainContext {
-                owner,
-                notebook_path,
-                notebook_rkey: rkey,
-                notebook_title: notebook.title.clone().unwrap_or_default().to_smolstr(),
-            })
-        }
-        Err(e) => {
-            tracing::debug!(path = path, error = %e, "Global notebook lookup failed");
-            None
-        }
-    }
-}