diff --git a/public/index.html b/public/index.html
index b4599afd..d173c80f 100644
--- a/public/index.html
+++ b/public/index.html
@@ -22,9 +22,9 @@
   <meta name="twitter:title" content="MeshCore Analyzer">
   <meta name="twitter:description" content="Real-time MeshCore LoRa mesh network analyzer — live packet visualization, node tracking, channel decryption, and route analysis.">
   <meta name="twitter:image" content="https://raw.githubusercontent.com/Kpa-clawbot/meshcore-analyzer/master/public/og-image.png">
-  <link rel="stylesheet" href="style.css?v=1774237752">
-  <link rel="stylesheet" href="home.css?v=1774295848">
-  <link rel="stylesheet" href="live.css?v=1774295848">
+  <link rel="stylesheet" href="style.css?v=1774297967">
+  <link rel="stylesheet" href="home.css?v=1774297967">
+  <link rel="stylesheet" href="live.css?v=1774297967">
   <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css"
     integrity="sha256-p4NxAoJBhIIN+hmNHrzRCf9tD/miZyoHS5obTRR9BMY="
     crossorigin="anonymous">
@@ -81,26 +81,26 @@
   <main id="app" role="main"></main>
 
   <script src="vendor/qrcode.js"></script>
-  <script src="roles.js?v=1774295848"></script>
-  <script src="customize.js?v=1774238281" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="region-filter.js?v=1774325000"></script>
-  <script src="hop-resolver.js?v=1774223973"></script>
-  <script src="hop-display.js?v=1774221932"></script>
-  <script src="app.js?v=1774238281"></script>
-  <script src="home.js?v=1774295848"></script>
-  <script src="packets.js?v=1774295848"></script>
-  <script src="map.js?v=1774295848" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="channels.js?v=1774331200" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="nodes.js?v=1774497660" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="traces.js?v=1774295848" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="analytics.js?v=1774126708" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="audio.js?v=1774208460" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="audio-v1-constellation.js?v=1774207165" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="audio-lab.js?v=1774229396" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="live.js?v=1774295848" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="observers.js?v=1774290000" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="observer-detail.js?v=1774219440" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="node-analytics.js?v=1774126708" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="perf.js?v=1774295848" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="roles.js?v=1774297967"></script>
+  <script src="customize.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="region-filter.js?v=1774297967"></script>
+  <script src="hop-resolver.js?v=1774297967"></script>
+  <script src="hop-display.js?v=1774297967"></script>
+  <script src="app.js?v=1774297967"></script>
+  <script src="home.js?v=1774297967"></script>
+  <script src="packets.js?v=1774297967"></script>
+  <script src="map.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="channels.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="nodes.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="traces.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="analytics.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="audio.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="audio-v1-constellation.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="audio-lab.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="live.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="observers.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="observer-detail.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="node-analytics.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="perf.js?v=1774297967" onerror="console.error('Failed to load:', this.src)"></script>
 </body>
 </html>
diff --git a/public/nodes.js b/public/nodes.js
index 38abd26d..45f1cad9 100644
--- a/public/nodes.js
+++ b/public/nodes.js
@@ -56,8 +56,8 @@
         va = (a.role || '').toLowerCase(); vb = (b.role || '').toLowerCase();
         return va < vb ? -dir : va > vb ? dir : 0;
       } else if (col === 'last_seen') {
-        va = a.last_seen ? new Date(a.last_seen).getTime() : 0;
-        vb = b.last_seen ? new Date(b.last_seen).getTime() : 0;
+        va = a.last_heard ? new Date(a.last_heard).getTime() : a.last_seen ? new Date(a.last_seen).getTime() : 0;
+        vb = b.last_heard ? new Date(b.last_heard).getTime() : b.last_seen ? new Date(b.last_seen).getTime() : 0;
         return (va - vb) * dir;
       } else if (col === 'advert_count') {
         va = a.advert_count || 0; vb = b.advert_count || 0;
@@ -90,8 +90,8 @@
     // Single source of truth for all status-related info
     const role = (n.role || '').toLowerCase();
     const roleColor = ROLE_COLORS[n.role] || '#6b7280';
-    // Accept pre-resolved lastHeard from health data, or fall back to last_seen
-    const lastHeardTime = n._lastHeard || n.last_seen;
+    // Prefer last_heard (from in-memory packets) > _lastHeard (health API) > last_seen (DB)
+    const lastHeardTime = n._lastHeard || n.last_heard || n.last_seen;
     const lastHeardMs = lastHeardTime ? new Date(lastHeardTime).getTime() : 0;
     const status = getNodeStatus(role, lastHeardMs);
     const statusLabel = status === 'active' ? '🟢 Active' : '⚪ Stale';
@@ -430,7 +430,10 @@
       }
       if (lastHeard) {
         const ms = { '1h': 3600000, '6h': 21600000, '24h': 86400000, '7d': 604800000, '30d': 2592000000 }[lastHeard];
-        if (ms) filtered = filtered.filter(n => n.last_seen && (Date.now() - new Date(n.last_seen).getTime()) < ms);
+        if (ms) filtered = filtered.filter(n => {
+          const t = n.last_heard || n.last_seen;
+          return t && (Date.now() - new Date(t).getTime()) < ms;
+        });
       }
       nodes = filtered;
 
@@ -586,7 +589,7 @@
         <td>${favStar(n.public_key, 'node-fav')}${isClaimed ? '<span class="claimed-badge" title="My Mesh">★</span> ' : ''}<strong>${n.name || '(unnamed)'}</strong></td>
         <td class="mono">${truncate(n.public_key, 16)}</td>
         <td><span class="badge" style="background:${roleColor}20;color:${roleColor}">${n.role}</span></td>
-        <td class="${lastSeenClass}">${timeAgo(n.last_seen)}</td>
+        <td class="${lastSeenClass}">${timeAgo(n.last_heard || n.last_seen)}</td>
         <td>${n.advert_count || 0}</td>
       </tr>`;
     }).join('');
diff --git a/server.js b/server.js
index 10fe2c04..6cfb0954 100644
--- a/server.js
+++ b/server.js
@@ -1301,6 +1301,15 @@ app.get('/api/nodes', (req, res) => {
     const allSizes = _hashSizeAllMap.get(node.public_key);
     node.hash_size_inconsistent = _isHashSizeFlipFlop(node.public_key);
     if (allSizes && allSizes.size > 1) node.hash_sizes_seen = [...allSizes].sort();
+    // Compute lastHeard from in-memory packets (more accurate than DB last_seen)
+    const nodePkts = pktStore.byNode.get(node.public_key);
+    if (nodePkts && nodePkts.length > 0) {
+      let latest = null;
+      for (const p of nodePkts) {
+        if (!latest || p.timestamp > latest) latest = p.timestamp;
+      }
+      if (latest) node.last_heard = latest;
+    }
   }
 
   res.json({ nodes, total, counts });