diff --git a/app/static/app.css b/app/static/app.css
index d539c81..d882d92 100644
--- a/app/static/app.css
+++ b/app/static/app.css
@@ -381,6 +381,9 @@ footer { background: var(--blue-dark); color: rgba(255,255,255,.6); margin-top:
 .err-ignored-chip { display: inline-flex; align-items: center; gap: .35rem; background: #f3f4f6; border: 1px solid #e5e7eb; border-radius: 20px; padding: .2rem .6rem .2rem .8rem; font-size: .82rem; font-family: monospace; }
 .err-ignored-remove { background: none; border: none; cursor: pointer; font-size: .75rem; color: #9ca3af; line-height: 1; padding: 0; transition: color .15s; }
 .err-ignored-remove:hover { color: #ef4444; }
+.banned-as-row td          { cursor: pointer; }
+.banned-as-row td:last-child { cursor: default; }
+.banned-toggle             { display: inline-block; width: 1rem; font-size: .8rem; color: var(--muted); user-select: none; }
 .banned-table .col-asn     { width: 7rem; }
 .banned-table .col-country { width: 4rem; text-align: center; }
 .banned-as-row td          { background: var(--blue-light); border-top: 2px solid var(--border); }
diff --git a/app/templates/errors_404.html b/app/templates/errors_404.html
index 920c17d..d6459a6 100644
--- a/app/templates/errors_404.html
+++ b/app/templates/errors_404.html
@@ -90,6 +90,7 @@
       <div class="err-search-wrap" style="margin-top:.5rem">
         <input type="search" id="ban-search" class="err-search" placeholder="Filtrer par IP, CIDR ou nom d'AS…" autocomplete="off">
         <span class="err-search-count" id="ban-search-count"></span>
+        <button id="btn-ban-expand-all" type="button" class="btn btn-sm">▼ Tout déplier</button>
       </div>
       <table class="file-table banned-table">
         <thead>
@@ -307,8 +308,9 @@
     for (const g of data.groups) {
       const asnLabel = g.asn ? `<strong>AS${escHtml(g.asn)}</strong>` : '<strong>AS inconnu</strong>';
       const n = g.entries.length;
-      html += `<tr class="banned-as-row" data-asn="${escHtml(g.asn)}" data-name="${escHtml((g.name||'').toLowerCase())}">
+      html += `<tr class="banned-as-row" data-asn="${escHtml(g.asn)}" data-name="${escHtml((g.name||'').toLowerCase())}" data-open="false">
         <td colspan="4" class="banned-as-cell">
+          <span class="banned-toggle">▶</span>
           <span class="banned-as-label">${asnLabel}${g.name ? ' · '+escHtml(g.name) : ''}${g.country ? ' <span class="banned-country">['+escHtml(g.country)+']</span>' : ''}</span>
           <span class="err-total-badge" style="margin-left:.5rem">${n} entrée${n!==1?'s':''}</span>
         </td>
@@ -317,7 +319,7 @@
         </td>
       </tr>`;
       for (const entry of g.entries) {
-        html += `<tr class="banned-entry-row" data-asn="${escHtml(g.asn)}" data-entry="${escHtml(entry)}">
+        html += `<tr class="banned-entry-row" data-asn="${escHtml(g.asn)}" data-entry="${escHtml(entry)}" style="display:none">
           <td colspan="4"><code class="err-ip">${escHtml(entry)}</code></td>
           <td class="col-actions">
             <button type="button" class="btn-unban btn btn-sm" data-entry="${escHtml(entry)}" title="Débloquer ${escHtml(entry)}">🔓</button>
@@ -329,6 +331,31 @@
     document.getElementById('ban-content').style.display = '';
   }
 
+  /* ── Replier/déplier un bloc AS ── */
+  function toggleAsBlock(asRow, forceOpen) {
+    const open = forceOpen !== undefined ? !forceOpen : asRow.dataset.open === 'true';
+    const nowOpen = !open;
+    asRow.dataset.open = nowOpen;
+    asRow.querySelector('.banned-toggle').textContent = nowOpen ? '▼' : '▶';
+    document.querySelectorAll(`#ban-tbody .banned-entry-row[data-asn="${asRow.dataset.asn}"]`).forEach(r => {
+      r.style.display = nowOpen ? '' : 'none';
+    });
+  }
+
+  document.addEventListener('click', e => {
+    if (e.target.closest('button')) return;
+    const asRow = e.target.closest('#ban-tbody .banned-as-row');
+    if (asRow) toggleAsBlock(asRow);
+  });
+
+  /* ── Tout déplier / Tout replier ── */
+  let allExpanded = false;
+  document.getElementById('btn-ban-expand-all')?.addEventListener('click', () => {
+    allExpanded = !allExpanded;
+    document.querySelectorAll('#ban-tbody .banned-as-row').forEach(r => toggleAsBlock(r, !allExpanded));
+    document.getElementById('btn-ban-expand-all').textContent = allExpanded ? '▲ Tout replier' : '▼ Tout déplier';
+  });
+
   /* ── Filtre bannis ── */
   const banSearch = document.getElementById('ban-search');
   const banCount  = document.getElementById('ban-search-count');
@@ -336,14 +363,16 @@
   function applyBanFilter() {
     const q = banSearch?.value.trim().toLowerCase() || '';
     let vis = 0;
-    document.querySelectorAll('#tab-banned .banned-as-row').forEach(asRow => {
+    document.querySelectorAll('#ban-tbody .banned-as-row').forEach(asRow => {
       const asn  = (asRow.dataset.asn  || '').toLowerCase();
       const name = (asRow.dataset.name || '').toLowerCase();
-      const rows = [...document.querySelectorAll(`#tab-banned .banned-entry-row[data-asn="${asRow.dataset.asn}"]`)];
+      const open = asRow.dataset.open === 'true';
+      const rows = [...document.querySelectorAll(`#ban-tbody .banned-entry-row[data-asn="${asRow.dataset.asn}"]`)];
       let any = false;
       rows.forEach(er => {
         const match = !q || er.dataset.entry.toLowerCase().includes(q) || asn.includes(q) || name.includes(q);
-        er.style.display = match ? '' : 'none';
+        // avec filtre : afficher les matchs même si replié ; sans filtre : respecter l'état
+        er.style.display = (q ? match : open) ? '' : 'none';
         if (match) { any = true; vis++; }
       });
       asRow.style.display = (!q || any) ? '' : 'none';