diff --git a/templates/404.html b/templates/404.html
new file mode 100644
index 0000000..b52ee20
--- /dev/null
+++ b/templates/404.html
@@ -0,0 +1,121 @@
+<!DOCTYPE html>
+<html lang="nl">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <link rel="icon" type="image/png" href="/static/img/favicon.png">
+    <script src="/static/js/bootstrap.bundle.min.js"></script>
+	<script src="/static/js/vis-network.min.js"></script>
+    <link href="/static/css/bootstrap.min.css" rel="stylesheet">
+    <title>AS215085 Looking Glass 404</title>
+    <style>
+        body { background-color: #f8f9fa; }
+        .card { margin-bottom: 1.5rem; }
+        .output-console {
+            background-color: #212529; color: #f8f9fa; font-family: 'Courier New', Courier, monospace;
+            padding: 1rem; border-radius: 0.25rem; min-height: 400px;
+            white-space: pre-wrap; word-wrap: break-word; overflow-x: auto;
+        }
+        #mynetwork {
+            width: 100%; height: 600px; border: 1px solid #dee2e6; border-radius: .25rem;
+        }
+        .copy-btn { cursor: pointer; }
+        .speedtest-links a { margin-right: 10px; margin-bottom: 10px; }
+        .header-content {
+            position: relative;
+            z-index: 2;
+        }
+        header {
+            position: relative;
+            background: url('/static/img/background.webp') no-repeat center center;
+            background-size: cover;
+            color: white;
+            padding: 40px 20px;
+            text-align: center;
+        }
+        header::after {
+            content: "";
+            position: absolute;
+            top: 0;
+            left: 0;
+            width: 100%;
+            height: 100%;
+            background: rgba(0, 0, 0, 0.5);
+            z-index: 1;
+        }
+        header h1, header p {
+            position: relative;
+            z-index: 2;
+        }
+        header h1 {
+            margin: 0;
+            font-size: 2.5em;
+        }
+        footer {
+            background-color: #2D2E43;
+            color: white;
+            text-align: center;
+            padding: 10px 0;
+            margin-top: 20px;
+        }
+        #form-error {
+            min-height: 1.5rem; /* Reserve space to prevent layout shift */
+        }
+        /* Styles for BGP raw output highlighting */
+        .asn-highlight { color: #5DADE2; }
+        .asn215085-highlight { color: #F9E79F; font-weight: bold; }
+        .best-line { color: #58D68D; font-weight: bold; }
+
+        /* --- Custom Styling for Buttons and Dropdowns --- */
+        .btn-custom {
+            background-color: #07AAF9;
+            border-color: #07AAF9;
+            color: white;
+        }
+        .btn-custom:hover {
+            background-color: #0698e0; /* Slightly darker blue for hover */
+            border-color: #0698e0;
+            color: white;
+        }
+    </style>
+</head>
+<body>
+    <header>
+        <div class="header-content">
+            <a href="/"> <img src="/static/img/as215085-logo.png" alt="AS215085 Logo" style="height: 120px; opacity: 1;!important"> </a>
+            <h2><b>AS215085 Looking Glass</b></h2>
+            <p><b>Proudly delivering the backbone for PixelHosting's services</b></p>
+        </div>
+    </header>
+
+    <nav class="navbar navbar-expand-lg navbar-light py-1" style="background-color: #07AAF9;">
+        <div class="container-fluid d-flex justify-content-center">
+            <div class="d-flex align-items-center">
+                <label for="main-location-selector" class="form-label mb-0 me-2 text-white"><b>Locatie:</b></label>
+                <select class="form-select form-select-sm w-auto" id="main-location-selector"></select>
+            </div>
+        </div>
+    </nav>
+
+    <div class="container my-5">
+            <h2>404 Not found</h2>
+            <center><img src="/static/img/404.gif" alt="404 GIF" width="60%">
+            <h3>Ooops! sorry this page was not found</h3>
+            <br>
+            <a href="https://lg.as215085.net" style="text-decoration: none;">
+                <button style="background-color: #07AAF9; color: white; border: none; border-radius: 25px; padding: 15px 30px; font-size: 18px;">
+                Go Home
+                </button>
+            </a></center>
+        </div>
+    </div>
+    
+    <footer>
+        <p>&copy; 2020 - <span id="year"></span> AS215085 (PixelHosting). All rights reserved.</p>
+        <script> document.getElementById("year").textContent = new Date().getFullYear(); </script>
+    </footer>
+
+    <script src="/static/js/materialize.min.js"></script>
+    <script src="/static/js/looking_glass.js"></script>
+</body>
+</html>
\ No newline at end of file
