diff --git a/TODO b/TODO
index 22eac60..035c319 100644
--- a/TODO
+++ b/TODO
@@ -1,4 +1,3 @@
-- list existing domains
 - logging
 - expect statements (pretend it's "expected", not "expect")
 - map_unexpected annotation string
diff --git a/src/service.rs b/src/service.rs
index fc55149..f731c0f 100644
--- a/src/service.rs
+++ b/src/service.rs
@@ -288,6 +288,36 @@ where
 
         self.render_page("/domain_sync.html", response)
     }
+
+    pub fn domains(&self) -> SvcResponse {
+        #[derive(Serialize)]
+        struct Response {
+            domains: Vec<String>,
+        }
+
+        let domains = match self.domain_manager.all_domains() {
+            Ok(domains) => domains,
+            Err(e) => {
+                return self.render_error_page(500, format!("failed get all domains: {e}").as_str())
+            }
+        };
+
+        let domains: Vec<domain::Name> = match domains.into_iter().try_collect() {
+            Ok(domains) => domains,
+            Err(e) => {
+                return self.render_error_page(500, format!("failed get all domains: {e}").as_str())
+            }
+        };
+
+        let mut domains: Vec<String> = domains
+            .into_iter()
+            .map(|domain| domain.as_str().to_string())
+            .collect();
+
+        domains.sort();
+
+        self.render_page("/domains.html", Response { domains: domains })
+    }
 }
 
 pub async fn handle_request<DomainManager>(
@@ -385,6 +415,7 @@ where
             })
             .await
         }
+        (&Method::GET, "/domains.html") => svc.domains(),
         _ => svc.render_error_page(404, "Page not found!"),
     }
 }
diff --git a/src/service/http_tpl/domains.html b/src/service/http_tpl/domains.html
new file mode 100644
index 0000000..7779b4f
--- /dev/null
+++ b/src/service/http_tpl/domains.html
@@ -0,0 +1,12 @@
+<h2>All Domains</h2>
+
+<p>Below are listed all domains which this Domiply instance is currently
+serving</p>
+
+<ul>
+{{ #each data.domains }}
+<li>
+  <a href="https://{{ this }}">{{ this }}</a>
+</li>
+{{ /each }}
+</ul>
diff --git a/src/service/http_tpl/index.html b/src/service/http_tpl/index.html
index 7296380..6ed880e 100644
--- a/src/service/http_tpl/index.html
+++ b/src/service/http_tpl/index.html
@@ -29,7 +29,7 @@ been set up.</p>
 <p>Or you can do any of the following alternative actions:</p>
 
 <ul>
-  <li>List all existing domains (TODO)</li>
+  <li><a href="/domains.html">List all existing domains</a></li>
   <li><a href="https://code.betamike.com/cryptic-io/domiply">View the Source Code</a></li>
   <li><a href="mailto:me@mediocregopher.com">Report a Bug</a></li>
 </ul>