diff --git a/plugins/network/api/routes.py b/plugins/network/api/routes.py
index 3dfdc87..a011fa8 100644
--- a/plugins/network/api/routes.py
+++ b/plugins/network/api/routes.py
@@ -24,9 +24,13 @@ def _upsert_primary_ip(asset, ip):
     """Create/update/clear the asset's primary IP Communication from an
     ipaddress string. No-op if the IP CommunicationType is not seeded."""
     ip = (ip or '').strip()
-    if not ip:
-        return
     comm = Communication.query.filter_by(assetid=asset.assetid, isprimary=True).first()
+    if not ip:
+        # Clearing the field clears the row's IP - it used to return early, so
+        # an address could be typed but never taken back out.
+        if comm:
+            comm.ipaddress = None
+        return
     if comm:
         comm.ipaddress = ip
         return
diff --git a/plugins/network/frontend/views/NetworkDeviceForm.vue b/plugins/network/frontend/views/NetworkDeviceForm.vue
index a10fe55..dbaa4b3 100644
--- a/plugins/network/frontend/views/NetworkDeviceForm.vue
+++ b/plugins/network/frontend/views/NetworkDeviceForm.vue
@@ -112,6 +112,16 @@
                 placeholder="e.g., sw-bldg1-floor2"
               />
             </div>
+            <div class="form-group">
+              <label for="ipaddress">IP Address</label>
+              <input
+                id="ipaddress"
+                v-model="form.ipaddress"
+                type="text"
+                class="form-control"
+                placeholder="e.g., 192.168.1.10"
+              />
+            </div>
             <div class="form-group">
               <label for="networkdevicetypeid">Device Type</label>
               <select id="networkdevicetypeid" v-model="form.networkdevicetypeid" class="form-control">
@@ -318,6 +328,7 @@ const form = ref({
   locationid: '',
   businessunitid: '',
   hostname: '',
+  ipaddress: '',
   networkdevicetypeid: '',
   vendorid: '',
   modelnumberid: '',
@@ -419,6 +430,9 @@ async function loadDevice() {
     form.value.mapx = data.mapx
     form.value.mapy = data.mapy
     form.value.notes = data.notes || ''
+    // The IP lives in a Communication row, not on the extension table; the API
+    // flattens it onto the response as ipaddress.
+    form.value.ipaddress = data.ipaddress || ''
 
     // Network device specific
     if (data.networkdevice) {
@@ -453,6 +467,7 @@ async function submitForm() {
       locationid: form.value.locationid || null,
       businessunitid: form.value.businessunitid || null,
       hostname: form.value.hostname || null,
+      ipaddress: form.value.ipaddress || null,
       networkdevicetypeid: form.value.networkdevicetypeid || null,
       vendorid: form.value.vendorid || null,
       modelnumberid: form.value.modelnumberid || null,
diff --git a/tests/test_plugins/test_network_ipaddress.py b/tests/test_plugins/test_network_ipaddress.py
index 1fd9fe8..08c212a 100644
--- a/tests/test_plugins/test_network_ipaddress.py
+++ b/tests/test_plugins/test_network_ipaddress.py
@@ -57,6 +57,39 @@ def test_update_network_device_ipaddress_upserts(client, db, auth_headers, netwo
     assert len(comms) == 1 and comms[0].ipaddress == '10.0.0.9'
 
 
+def test_clearing_the_ip_takes_it_back_out(client, db, auth_headers, network_setup):
+    """Blanking the form field must clear the stored IP.
+
+    The upsert helper returned early on a blank value, so an address could be
+    typed and never removed - invisible until the form grew an IP field.
+    """
+    from shopdb.core.models import Communication
+    created = client.post('/api/network', json={
+        'assetnumber': 'SW-09', 'name': 'Switch', 'ipaddress': '10.0.0.5',
+    }, headers=auth_headers).get_json()['data']
+    devid = created['networkdevice']['networkdeviceid']
+
+    cleared = client.put(f'/api/network/{devid}', json={'ipaddress': ''},
+                         headers=auth_headers)
+    assert cleared.status_code == 200, cleared.get_json()
+    assert not cleared.get_json()['data']['ipaddress']
+
+    comms = Communication.query.filter_by(assetid=created['assetid']).all()
+    assert len(comms) == 1 and comms[0].ipaddress is None
+
+
+def test_omitting_ipaddress_leaves_it_alone(client, db, auth_headers, network_setup):
+    """A PUT that never mentions the field must not wipe the stored IP."""
+    created = client.post('/api/network', json={
+        'assetnumber': 'SW-10', 'name': 'Switch', 'ipaddress': '10.0.0.7',
+    }, headers=auth_headers).get_json()['data']
+    devid = created['networkdevice']['networkdeviceid']
+
+    updated = client.put(f'/api/network/{devid}', json={'hostname': 'sw-10'},
+                         headers=auth_headers)
+    assert updated.get_json()['data']['ipaddress'] == '10.0.0.7'
+
+
 def test_seed_reference_data_creates_ip_commtype(app, db):
     """The reference-data seed now creates the IP communication type the asset
     import depends on."""