diff --git a/index.html b/index.html
index 24b3a1b..8661424 100644
--- a/index.html
+++ b/index.html
@@ -271,17 +271,18 @@
             <div class="sub-tab-content" id="subtab-ipam">
                 <div class="main-container">
                     <div class="search-bar" style="display:flex;gap:0.5rem;align-items:center;">
-                        <input type="text" id="ipam-search-input" placeholder="Hae IP, VLAN, verkko..." style="flex:1;">
-                        <button class="btn-primary" id="btn-add-ipam" style="white-space:nowrap;">+ Lisää merkintä</button>
+                        <input type="text" id="ipam-search-input" placeholder="Hae IP, verkko, VLAN..." style="flex:1;">
+                        <button class="btn-primary" id="btn-add-ipam" style="white-space:nowrap;">+ Lisää verkko / IP</button>
                     </div>
+                    <div id="ipam-breadcrumb" class="ipam-breadcrumb" style="display:none;"></div>
                     <div class="table-card">
-                        <table id="ipam-table">
+                        <table id="ipam-table" class="ipam-tree-table">
                             <thead>
                                 <tr>
-                                    <th>Tyyppi</th>
+                                    <th style="width:120px;">Tyyppi</th>
                                     <th>Verkko / IP</th>
-                                    <th>VLAN</th>
                                     <th>Nimi / Kuvaus</th>
+                                    <th>VLAN</th>
                                     <th>Sijainti</th>
                                     <th>Tila</th>
                                     <th>Asiakas</th>
@@ -291,11 +292,38 @@
                             <tbody id="ipam-tbody"></tbody>
                         </table>
                         <div id="no-ipam" class="empty-state" style="display:none;">
-                            <p>Ei IPAM-merkintöjä vielä.</p>
+                            <p>Ei verkkoja tai IP-osoitteita vielä.</p>
                         </div>
                     </div>
                     <div class="summary-bar">
-                        <span id="ipam-count">0 merkintää</span>
+                        <span id="ipam-count">0 verkkoa</span>
+                    </div>
+
+                    <!-- VLAN-luettelo -->
+                    <div id="ipam-vlan-section" style="margin-top:1.5rem;">
+                        <div style="display:flex;justify-content:space-between;align-items:center;margin-bottom:0.5rem;">
+                            <h4 style="margin:0;color:#0f3460;">VLANit</h4>
+                            <button class="btn-primary" id="btn-add-vlan" style="white-space:nowrap;font-size:0.82rem;">+ Lisää VLAN</button>
+                        </div>
+                        <div class="table-card">
+                            <table>
+                                <thead>
+                                    <tr>
+                                        <th style="width:80px;">VLAN</th>
+                                        <th>Verkko</th>
+                                        <th>Nimi / Kuvaus</th>
+                                        <th>Sijainti</th>
+                                        <th>Tila</th>
+                                        <th>Asiakas</th>
+                                        <th>Toiminnot</th>
+                                    </tr>
+                                </thead>
+                                <tbody id="ipam-vlan-tbody"></tbody>
+                            </table>
+                        </div>
+                        <div class="summary-bar">
+                            <span id="ipam-vlan-count">0 VLANia</span>
+                        </div>
                     </div>
                 </div>
             </div>
diff --git a/script.js b/script.js
index 5b1dd75..98c3852 100644
--- a/script.js
+++ b/script.js
@@ -2957,6 +2957,102 @@ document.getElementById('btn-cancel-site')?.addEventListener('click', () => {
 // ==================== IPAM ====================
 
 let ipamData = [];
+let ipamExpandedIds = new Set();
+let ipamDrillStack = []; // [{id, label}] breadcrumb
+
+// --- IP-laskenta-apufunktiot ---
+function ipToInt(ip) {
+    return ip.split('.').reduce((acc, oct) => (acc << 8) + parseInt(oct), 0) >>> 0;
+}
+function prefixToMask(prefix) {
+    return prefix === 0 ? 0 : (~0 << (32 - prefix)) >>> 0;
+}
+function parseNetwork(verkko) {
+    if (!verkko) return null;
+    const v = verkko.trim();
+    if (v.includes('/')) {
+        const [ip, pfx] = v.split('/');
+        const prefix = parseInt(pfx);
+        if (isNaN(prefix) || prefix < 0 || prefix > 32) return null;
+        const parts = ip.split('.');
+        if (parts.length !== 4) return null;
+        return { net: ipToInt(ip), prefix };
+    } else {
+        const parts = v.split('.');
+        if (parts.length !== 4) return null;
+        return { net: ipToInt(v), prefix: 32 };
+    }
+}
+function isSubnetOf(childNet, childPrefix, parentNet, parentPrefix) {
+    if (childPrefix <= parentPrefix) return false;
+    const mask = prefixToMask(parentPrefix);
+    return (childNet & mask) === (parentNet & mask);
+}
+
+// --- Puurakenne ---
+function buildIpamTree(entries) {
+    // Parsitaan verkko-osoitteet ja suodatetaan validit
+    const items = entries.map(e => {
+        const parsed = parseNetwork(e.verkko);
+        return parsed ? { entry: e, net: parsed.net, prefix: parsed.prefix, children: [] } : null;
+    }).filter(Boolean);
+    // Järjestetään: pienin prefix (isoin verkko) ensin, sitten IP-osoitteen mukaan
+    items.sort((a, b) => a.prefix - b.prefix || a.net - b.net);
+    const roots = [];
+    for (const item of items) {
+        let placed = false;
+        // Etsi lähin parent (suurin prefix joka sisältää tämän)
+        const findParent = (nodes) => {
+            for (let i = nodes.length - 1; i >= 0; i--) {
+                const node = nodes[i];
+                if (isSubnetOf(item.net, item.prefix, node.net, node.prefix)) {
+                    // Tarkista ensin onko jokin lapsi tarkempi parent
+                    if (!findParent(node.children)) {
+                        node.children.push(item);
+                    }
+                    return true;
+                }
+            }
+            return false;
+        };
+        if (!findParent(roots)) {
+            roots.push(item);
+        }
+    }
+    return roots;
+}
+
+function flattenTree(nodes, depth, drillId) {
+    // Jos drill-down aktiivinen, etsi drill-node ja renderöi vain sen lapset
+    if (drillId) {
+        const findNode = (list) => {
+            for (const n of list) {
+                if (n.entry.id === drillId) return n;
+                const found = findNode(n.children);
+                if (found) return found;
+            }
+            return null;
+        };
+        const drillNode = findNode(nodes);
+        if (drillNode) {
+            nodes = drillNode.children;
+            depth = 0;
+        }
+    }
+    const rows = [];
+    const render = (list, d) => {
+        for (const node of list) {
+            const hasChildren = node.children.length > 0;
+            const expanded = ipamExpandedIds.has(node.entry.id);
+            rows.push({ entry: node.entry, depth: d, hasChildren, expanded });
+            if (hasChildren && expanded) {
+                render(node.children, d + 1);
+            }
+        }
+    };
+    render(nodes, depth);
+    return rows;
+}
 
 async function loadIpam() {
     try {
@@ -2967,9 +3063,11 @@ async function loadIpam() {
 
 function renderIpam() {
     const query = (document.getElementById('ipam-search-input')?.value || '').toLowerCase().trim();
-    let filtered = ipamData;
+
+    // --- Verkot + IP:t (hierarkkinen puu) ---
+    let networkEntries = ipamData.filter(e => e.tyyppi === 'subnet' || e.tyyppi === 'ip');
     if (query) {
-        filtered = ipamData.filter(e =>
+        networkEntries = networkEntries.filter(e =>
             (e.tyyppi || '').toLowerCase().includes(query) ||
             (e.verkko || '').toLowerCase().includes(query) ||
             (e.nimi || '').toLowerCase().includes(query) ||
@@ -2979,22 +3077,107 @@ function renderIpam() {
             String(e.vlan_id || '').includes(query)
         );
     }
+
+    const tree = buildIpamTree(networkEntries);
+
+    // Breadcrumb
+    const bcEl = document.getElementById('ipam-breadcrumb');
+    if (bcEl) {
+        const drillId = ipamDrillStack.length > 0 ? ipamDrillStack[ipamDrillStack.length - 1].id : null;
+        if (ipamDrillStack.length === 0) {
+            bcEl.style.display = 'none';
+        } else {
+            bcEl.style.display = '';
+            bcEl.innerHTML = `<span class="ipam-bc-link" onclick="ipamDrillTo(-1)">Kaikki verkot</span>` +
+                ipamDrillStack.map((s, i) =>
+                    ` <span style="color:#aaa;">›</span> <span class="ipam-bc-link${i === ipamDrillStack.length - 1 ? ' ipam-bc-current' : ''}" onclick="ipamDrillTo(${i})">${esc(s.label)}</span>`
+                ).join('');
+        }
+        // Flatten tree siten että drill-down huomioidaan
+        var drillTarget = drillId;
+    } else {
+        var drillTarget = null;
+    }
+
+    const rows = flattenTree(tree, 0, drillTarget);
+
     const tbody = document.getElementById('ipam-tbody');
     const noIpam = document.getElementById('no-ipam');
-    if (filtered.length === 0) {
+    const tilaClass = { vapaa: 'ipam-tila-vapaa', varattu: 'ipam-tila-varattu', reserved: 'ipam-tila-reserved' };
+    const tilaLabel = { vapaa: 'Vapaa', varattu: 'Varattu', reserved: 'Reserved' };
+
+    if (rows.length === 0 && !query) {
         tbody.innerHTML = '';
         if (noIpam) noIpam.style.display = 'block';
     } else {
         if (noIpam) noIpam.style.display = 'none';
-        const tyyppiLabel = { subnet: 'Subnet', vlan: 'VLAN', ip: 'IP' };
-        const tilaClass = { vapaa: 'ipam-tila-vapaa', varattu: 'ipam-tila-varattu', reserved: 'ipam-tila-reserved' };
-        const tilaLabel = { vapaa: 'Vapaa', varattu: 'Varattu', reserved: 'Reserved' };
-        tbody.innerHTML = filtered.map(e => `<tr>
-            <td><span style="font-weight:600;">${tyyppiLabel[e.tyyppi] || e.tyyppi}</span></td>
+        tbody.innerHTML = rows.map(r => {
+            const e = r.entry;
+            const indent = r.depth * 1.5;
+            const toggleIcon = r.hasChildren
+                ? `<span class="ipam-toggle" onclick="event.stopPropagation();ipamToggle('${e.id}')">${r.expanded ? '▼' : '▶'}</span> `
+                : '<span class="ipam-toggle-placeholder"></span> ';
+            const typeTag = e.tyyppi === 'subnet'
+                ? '<span class="ipam-type-subnet">Subnet</span>'
+                : '<span class="ipam-type-ip">IP</span>';
+            const drillBtn = (e.tyyppi === 'subnet' && r.hasChildren)
+                ? ` <span class="ipam-drill" onclick="event.stopPropagation();ipamDrillInto('${e.id}','${esc(e.verkko || e.nimi)}')" title="Poraudu sisään">→</span>`
+                : '';
+            return `<tr class="ipam-tree-row" onclick="ipamToggle('${e.id}')">
+                <td style="padding-left:${indent}rem;white-space:nowrap;">
+                    ${toggleIcon}${typeTag}
+                </td>
+                <td><code class="ipam-network">${esc(e.verkko || '-')}</code>${drillBtn}</td>
+                <td>${esc(e.nimi || '-')}</td>
+                <td>${e.vlan_id ? '<strong>' + e.vlan_id + '</strong>' : '-'}</td>
+                <td>${e.site_name ? esc(e.site_name) : '<span style="color:#ccc;">—</span>'}</td>
+                <td><span class="ipam-tila ${tilaClass[e.tila] || ''}">${tilaLabel[e.tila] || e.tila}</span></td>
+                <td>${esc(e.asiakas || '-')}</td>
+                <td class="actions-cell" onclick="event.stopPropagation()">
+                    <button class="btn-link" onclick="editIpam('${e.id}')">✎</button>
+                    <button class="btn-link" style="color:#dc2626;" onclick="deleteIpam('${e.id}','${esc(e.nimi || e.verkko)}')">🗑</button>
+                </td>
+            </tr>`;
+        }).join('');
+    }
+
+    const netCount = networkEntries.length;
+    document.getElementById('ipam-count').textContent = netCount + ' verkkoa/IP:tä' + (query ? ` (${ipamData.filter(e => e.tyyppi !== 'vlan').length} yhteensä)` : '');
+
+    // --- VLANit ---
+    renderIpamVlans(query);
+}
+
+function renderIpamVlans(query) {
+    let vlans = ipamData.filter(e => e.tyyppi === 'vlan');
+    if (query) {
+        vlans = vlans.filter(e =>
+            String(e.vlan_id || '').includes(query) ||
+            (e.nimi || '').toLowerCase().includes(query) ||
+            (e.verkko || '').toLowerCase().includes(query) ||
+            (e.site_name || '').toLowerCase().includes(query) ||
+            (e.asiakas || '').toLowerCase().includes(query)
+        );
+    }
+    vlans.sort((a, b) => (a.vlan_id || 0) - (b.vlan_id || 0));
+
+    const tbody = document.getElementById('ipam-vlan-tbody');
+    const section = document.getElementById('ipam-vlan-section');
+    if (!tbody) return;
+
+    const tilaClass = { vapaa: 'ipam-tila-vapaa', varattu: 'ipam-tila-varattu', reserved: 'ipam-tila-reserved' };
+    const tilaLabel = { vapaa: 'Vapaa', varattu: 'Varattu', reserved: 'Reserved' };
+
+    if (vlans.length === 0 && !query) {
+        tbody.innerHTML = '';
+        if (section) section.style.display = 'none';
+    } else {
+        if (section) section.style.display = '';
+        tbody.innerHTML = vlans.map(e => `<tr>
+            <td><strong>${e.vlan_id || '-'}</strong></td>
             <td><code style="font-size:0.85rem;">${esc(e.verkko || '-')}</code></td>
-            <td>${e.vlan_id ? '<strong>' + e.vlan_id + '</strong>' : '-'}</td>
             <td>${esc(e.nimi || '-')}</td>
-            <td>${e.site_name ? esc(e.site_name) : '<span style="color:#ccc;">-</span>'}</td>
+            <td>${e.site_name ? esc(e.site_name) : '<span style="color:#ccc;">—</span>'}</td>
             <td><span class="ipam-tila ${tilaClass[e.tila] || ''}">${tilaLabel[e.tila] || e.tila}</span></td>
             <td>${esc(e.asiakas || '-')}</td>
             <td class="actions-cell">
@@ -3003,7 +3186,28 @@ function renderIpam() {
             </td>
         </tr>`).join('');
     }
-    document.getElementById('ipam-count').textContent = filtered.length + ' merkintää' + (query ? ` (${ipamData.length} yhteensä)` : '');
+    document.getElementById('ipam-vlan-count').textContent = vlans.length + ' VLANia';
+}
+
+// --- Toggle & Drill ---
+function ipamToggle(id) {
+    if (ipamExpandedIds.has(id)) ipamExpandedIds.delete(id);
+    else ipamExpandedIds.add(id);
+    renderIpam();
+}
+function ipamDrillInto(id, label) {
+    ipamDrillStack.push({ id, label });
+    ipamExpandedIds.clear(); // reset expand-tila uudessa näkymässä
+    renderIpam();
+}
+function ipamDrillTo(index) {
+    if (index < 0) {
+        ipamDrillStack = [];
+    } else {
+        ipamDrillStack = ipamDrillStack.slice(0, index + 1);
+    }
+    ipamExpandedIds.clear();
+    renderIpam();
 }
 
 async function loadIpamSitesDropdown() {
@@ -3043,8 +3247,18 @@ async function deleteIpam(id, name) {
 document.getElementById('btn-add-ipam')?.addEventListener('click', async () => {
     document.getElementById('ipam-form-id').value = '';
     document.getElementById('ipam-form').reset();
+    document.getElementById('ipam-form-tyyppi').value = 'subnet';
     await loadIpamSitesDropdown();
-    document.getElementById('ipam-modal-title').textContent = 'Lisää IPAM-merkintä';
+    document.getElementById('ipam-modal-title').textContent = 'Lisää verkko / IP';
+    document.getElementById('ipam-modal').style.display = 'flex';
+});
+
+document.getElementById('btn-add-vlan')?.addEventListener('click', async () => {
+    document.getElementById('ipam-form-id').value = '';
+    document.getElementById('ipam-form').reset();
+    document.getElementById('ipam-form-tyyppi').value = 'vlan';
+    await loadIpamSitesDropdown();
+    document.getElementById('ipam-modal-title').textContent = 'Lisää VLAN';
     document.getElementById('ipam-modal').style.display = 'flex';
 });
 
diff --git a/style.css b/style.css
index e5b8abd..9e7f6fa 100644
--- a/style.css
+++ b/style.css
@@ -1073,6 +1073,23 @@ span.empty {
 .ipam-tila-varattu { background:#fef3cd; color:#856404; }
 .ipam-tila-reserved { background:#e2e3e5; color:#495057; }
 
+/* IPAM puunäkymä */
+.ipam-tree-table tbody tr { cursor: pointer; }
+.ipam-tree-table tbody tr:hover { background: #f0f4ff; }
+.ipam-toggle { cursor:pointer; display:inline-block; width:1rem; text-align:center; font-size:0.7rem; color:#555; user-select:none; }
+.ipam-toggle:hover { color:#0f3460; }
+.ipam-toggle-placeholder { display:inline-block; width:1rem; }
+.ipam-type-subnet { display:inline-block; padding:1px 8px; border-radius:4px; font-size:0.75rem; font-weight:700; background:#e0e7ff; color:#3730a3; }
+.ipam-type-ip { display:inline-block; padding:1px 8px; border-radius:4px; font-size:0.75rem; font-weight:700; background:#f0fdf4; color:#166534; }
+.ipam-network { font-size:0.85rem; background:#f8f9fa; padding:1px 6px; border-radius:3px; }
+.ipam-drill { cursor:pointer; font-size:0.8rem; color:#6366f1; margin-left:0.4rem; }
+.ipam-drill:hover { color:#4338ca; text-decoration:underline; }
+.ipam-breadcrumb { padding:0.5rem 0; font-size:0.85rem; color:#555; }
+.ipam-bc-link { cursor:pointer; color:#6366f1; }
+.ipam-bc-link:hover { text-decoration:underline; }
+.ipam-bc-current { color:#333; font-weight:600; cursor:default; }
+.ipam-bc-current:hover { text-decoration:none; }
+
 /* Role badge */
 .role-badge {
     display: inline-block;