diff --git a/src/subcommand/server.rs b/src/subcommand/server.rs
index b69a8bc07b..c7a099afd5 100644
--- a/src/subcommand/server.rs
+++ b/src/subcommand/server.rs
@@ -298,6 +298,7 @@ impl Server {
   }
 
   async fn ordinal(
+    Extension(chain): Extension<Chain>,
     Extension(index): Extension<Arc<Index>>,
     Path(DeserializeFromStr(ordinal)): Path<DeserializeFromStr<Ordinal>>,
   ) -> ServerResult<PageHtml> {
@@ -313,14 +314,14 @@ impl Server {
           ))
         })?,
       }
-      .page(),
+      .page(chain),
     )
   }
 
   async fn output(
+    Extension(chain): Extension<Chain>,
     Extension(index): Extension<Arc<Index>>,
     Path(outpoint): Path<OutPoint>,
-    Extension(chain): Extension<Chain>,
   ) -> ServerResult<PageHtml> {
     let list = index
       .list(outpoint)
@@ -343,11 +344,12 @@ impl Server {
         chain,
         output,
       }
-      .page(),
+      .page(chain),
     )
   }
 
   async fn range(
+    Extension(chain): Extension<Chain>,
     Path((DeserializeFromStr(start), DeserializeFromStr(end))): Path<(
       DeserializeFromStr<Ordinal>,
       DeserializeFromStr<Ordinal>,
@@ -358,7 +360,7 @@ impl Server {
       Ordering::Greater => Err(ServerError::BadRequest(
         "range start greater than range end".to_string(),
       )),
-      Ordering::Less => Ok(RangeHtml { start, end }.page()),
+      Ordering::Less => Ok(RangeHtml { start, end }.page(chain)),
     }
   }
 
@@ -368,20 +370,24 @@ impl Server {
     })?))
   }
 
-  async fn home(Extension(index): Extension<Arc<Index>>) -> ServerResult<PageHtml> {
+  async fn home(
+    Extension(chain): Extension<Chain>,
+    Extension(index): Extension<Arc<Index>>,
+  ) -> ServerResult<PageHtml> {
     Ok(
       HomeHtml::new(
         index
           .blocks(100)
           .map_err(|err| ServerError::Internal(anyhow!("error getting blocks: {err}")))?,
       )
-      .page(),
+      .page(chain),
     )
   }
 
   async fn block(
+    Extension(chain): Extension<Chain>,
+    Extension(index): Extension<Arc<Index>>,
     Path(DeserializeFromStr(query)): Path<DeserializeFromStr<BlockQuery>>,
-    index: Extension<Arc<Index>>,
   ) -> ServerResult<PageHtml> {
     let (block, height) = match query {
       BlockQuery::Height(height) => {
@@ -427,7 +433,7 @@ impl Server {
           .height()
           .map_err(|err| ServerError::Internal(anyhow!("failed to get index height: {err}")))?,
       )
-      .page(),
+      .page(chain),
     )
   }
 
@@ -448,7 +454,7 @@ impl Server {
           .ok_or_else(|| ServerError::NotFound(format!("transaction {txid} unknown")))?,
         chain,
       )
-      .page(),
+      .page(chain),
     )
   }
 
@@ -546,6 +552,7 @@ impl Server {
   }
 
   async fn input(
+    Extension(chain): Extension<Chain>,
     Extension(index): Extension<Arc<Index>>,
     Path(path): Path<(u64, usize, usize)>,
   ) -> Result<PageHtml, ServerError> {
@@ -565,7 +572,7 @@ impl Server {
       .nth(path.2)
       .ok_or_else(not_found)?;
 
-    Ok(InputHtml { path, input }.page())
+    Ok(InputHtml { path, input }.page(chain))
   }
 
   async fn faq() -> Redirect {
@@ -1101,6 +1108,15 @@ mod tests {
   );
   }
 
+  #[test]
+  fn nav_displays_chain() {
+    TestServer::new().assert_response_regex(
+      "/",
+      StatusCode::OK,
+      ".*<a href=/>Ordinals<sup>regtest</sup></a>.*",
+    );
+  }
+
   #[test]
   fn home_block_limit() {
     let test_server = TestServer::new();
diff --git a/src/subcommand/server/templates.rs b/src/subcommand/server/templates.rs
index ad815966fb..a2523f68c2 100644
--- a/src/subcommand/server/templates.rs
+++ b/src/subcommand/server/templates.rs
@@ -22,12 +22,14 @@ mod transaction;
 #[derive(Boilerplate)]
 pub(crate) struct PageHtml {
   content: Box<dyn Content>,
+  chain: Chain,
 }
 
 impl PageHtml {
-  pub(crate) fn new<T: Content + 'static>(content: T) -> Self {
+  pub(crate) fn new<T: Content + 'static>(content: T, chain: Chain) -> Self {
     Self {
       content: Box::new(content),
+      chain,
     }
   }
 }
@@ -35,11 +37,11 @@ impl PageHtml {
 pub(crate) trait Content: Display + 'static {
   fn title(&self) -> String;
 
-  fn page(self) -> PageHtml
+  fn page(self, chain: Chain) -> PageHtml
   where
     Self: Sized,
   {
-    PageHtml::new(self)
+    PageHtml::new(self, chain)
   }
 }
 
@@ -48,7 +50,7 @@ mod tests {
   use super::*;
 
   #[test]
-  fn page() {
+  fn page_mainnet() {
     struct Foo;
 
     impl Display for Foo {
@@ -64,7 +66,7 @@ mod tests {
     }
 
     assert_regex_match!(
-      Foo.page().to_string(),
+      Foo.page(Chain::Mainnet).to_string(),
       "<!doctype html>
 <html lang=en>
   <head>
@@ -91,6 +93,54 @@ mod tests {
   </main>
   </body>
 </html>
+"
+    );
+  }
+
+  #[test]
+  fn page_signet() {
+    struct Foo;
+
+    impl Display for Foo {
+      fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        write!(f, "<h1>Foo</h1>")
+      }
+    }
+
+    impl Content for Foo {
+      fn title(&self) -> String {
+        "Foo".to_string()
+      }
+    }
+
+    assert_regex_match!(
+      Foo.page(Chain::Signet).to_string(),
+      "<!doctype html>
+<html lang=en>
+  <head>
+    <meta charset=utf-8>
+    <meta name=format-detection content='telephone=no'>
+    <meta name=viewport content='width=device-width,initial-scale=1.0'>
+    <title>Foo</title>
+    <link href=/static/index.css rel=stylesheet>
+    <link href=/static/modern-normalize.css rel=stylesheet>
+  </head>
+  <body>
+  <header>
+    <nav>
+      <a href=/>Ordinals<sup>signet</sup></a>
+      .*
+      <form action=/search method=get>
+        <input type=text .*>
+        <input type=submit value=Search>
+      </form>
+    </nav>
+  </header>
+  <main>
+<h1>Foo</h1>
+  </main>
+  </body>
+</html>
 "
     );
   }
diff --git a/templates/page.html b/templates/page.html
index 0285acaeb8..af0770742e 100644
--- a/templates/page.html
+++ b/templates/page.html
@@ -11,7 +11,7 @@
   <body>
   <header>
     <nav>
-      <a href=/>Ordinals</a>
+      <a href=/>Ordinals{% if self.chain != Chain::Mainnet { %}<sup>{{self.chain}}</sup>{% } %}</a>
       <a href=https://docs.ordinals.com/>Docs</a>
       <a href=https://github.com/casey/ord>GitHub</a>
       <a href=/clock>Clock</a>