diff --git a/README.md b/README.md
index 4e63282..7bfc55c 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@ Plugin für **NetBox 4.6.5** mit zwei Funktionen:
 - Eine zusätzliche IP-Netzübersicht kann nach Organisation/Region, Standortgruppe, Standort, Lokation, Mandantengruppe und Mandant gefiltert werden.
 - Unter **IPAM → IP-Bereiche** legt die Aktion **Alle fehlenden Bereiche anlegen** die Bereiche für sämtliche bereits vorhandenen, sichtbaren IP-Adressen an.
 - Unter **IP-Bereich → IP-Adressen** wird das zugehörige Gerät beziehungsweise die VM standardmäßig als eigene Spalte angezeigt.
+- Die **IP-Netzübersicht** ist als eigener Eintrag direkt im Menü **IPAM** verfügbar.
 
 ## Installation
 
diff --git a/netbox_better_ips/__init__.py b/netbox_better_ips/__init__.py
index 16e81ed..b930002 100644
--- a/netbox_better_ips/__init__.py
+++ b/netbox_better_ips/__init__.py
@@ -1,4 +1,4 @@
 from .config import BetterIPsConfig
 
-__version__ = "1.2.0"
+__version__ = "1.2.1"
 config = BetterIPsConfig
diff --git a/netbox_better_ips/config.py b/netbox_better_ips/config.py
index 07dfdea..adb2402 100644
--- a/netbox_better_ips/config.py
+++ b/netbox_better_ips/config.py
@@ -6,7 +6,7 @@ class BetterIPsConfig(PluginConfig):
     verbose_name = "NetBox Better IPs"
     description = "Automatische Prefix-Zuordnung und erweiterte IP-Netzübersicht"
     author = "LKE"
-    version = "1.2.0"
+    version = "1.2.1"
     base_url = "better-ips"
     min_version = "4.6.5"
     max_version = "4.6.99"
@@ -21,3 +21,6 @@ class BetterIPsConfig(PluginConfig):
         super().ready()
         from . import signals  # noqa: F401
         from . import tables  # noqa: F401
+        from .navigation import register_ipam_menu_item
+
+        register_ipam_menu_item()
diff --git a/netbox_better_ips/management/commands/reconcile_ip_prefixes.py b/netbox_better_ips/management/commands/reconcile_ip_prefixes.py
index 1e87b44..5c26a5b 100644
--- a/netbox_better_ips/management/commands/reconcile_ip_prefixes.py
+++ b/netbox_better_ips/management/commands/reconcile_ip_prefixes.py
@@ -11,12 +11,17 @@ class Command(BaseCommand):
         parser.add_argument("--dry-run", action="store_true")
 
     def handle(self, *args, **options):
-        created = skipped = 0
+        created = skipped = failed = 0
         for address in IPAddress.objects.select_related("tenant", "assigned_object_type").iterator():
-            ip_range, was_created = ensure_range_for_ip(address)
-            if options["dry_run"] and was_created:
-                ip_range.delete()
-            created += int(was_created)
-            skipped += int(ip_range is None)
+            try:
+                ip_range, was_created = ensure_range_for_ip(address)
+                if options["dry_run"] and was_created:
+                    ip_range.delete()
+                created += int(was_created)
+                skipped += int(ip_range is None)
+            except Exception as exc:
+                failed += 1
+                self.stderr.write(f"Fehler bei {address}: {exc}")
         verb = "würden erstellt" if options["dry_run"] else "erstellt"
-        self.stdout.write(self.style.SUCCESS(f"{created} IP-Bereiche {verb}; {skipped} Hostmasken ignoriert."))
+        message = f"{created} IP-Bereiche {verb}; {skipped} Hostmasken ignoriert; {failed} Fehler."
+        self.stdout.write(self.style.SUCCESS(message) if not failed else self.style.WARNING(message))
diff --git a/netbox_better_ips/navigation.py b/netbox_better_ips/navigation.py
index 27b1775..02e7f31 100644
--- a/netbox_better_ips/navigation.py
+++ b/netbox_better_ips/navigation.py
@@ -1,10 +1,25 @@
-from netbox.plugins import PluginMenuItem
+from netbox.navigation import MenuItem
 
-menu_items = (
-    PluginMenuItem(
-        link="plugins:netbox_better_ips:network_overview",
-        link_text="IP-Netzübersicht",
-        permissions=["ipam.view_prefix"],
-    ),
-)
 
+# The public plugin navigation API can only create a separate Plugins menu.
+# NetBox 4.6.5 does not expose an API for extending an existing core menu, so
+# this pinned-version integration appends our entry to IPAM's first group.
+def register_ipam_menu_item():
+    from netbox.navigation.menu import IPAM_MENU
+
+    group = IPAM_MENU.groups[0]
+    link = "plugins:netbox_better_ips:network_overview"
+    if any(item.link == link for item in group.items):
+        return
+    group.items = (
+        *group.items,
+        MenuItem(
+            link=link,
+            link_text="IP-Netzübersicht",
+            permissions=["ipam.view_prefix"],
+        ),
+    )
+
+
+# Do not duplicate the entry in NetBox's generic Plugins menu.
+menu_items = ()
diff --git a/netbox_better_ips/services.py b/netbox_better_ips/services.py
index 450eb35..3426c84 100644
--- a/netbox_better_ips/services.py
+++ b/netbox_better_ips/services.py
@@ -1,6 +1,7 @@
 import ipaddress
 import logging
 
+import netaddr
 from django.db import transaction
 from ipam.models import IPRange
 from netbox.plugins import get_plugin_config
@@ -46,8 +47,10 @@ def ensure_range_for_ip(ip, *, config=None):
     elif network.version == 6 and network.prefixlen < 127:
         first += 1
 
-    start_address = f"{ipaddress.ip_address(first)}/{network.prefixlen}"
-    end_address = f"{ipaddress.ip_address(last)}/{network.prefixlen}"
+    # IPRange.save() performs arithmetic on the field values before Django's
+    # field conversion runs, so these must be netaddr objects rather than strings.
+    start_address = netaddr.IPNetwork(f"{ipaddress.ip_address(first)}/{network.prefixlen}")
+    end_address = netaddr.IPNetwork(f"{ipaddress.ip_address(last)}/{network.prefixlen}")
     lookup = {
         "start_address": start_address,
         "end_address": end_address,
diff --git a/pyproject.toml b/pyproject.toml
index ea58737..7ce5242 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "netbox-better-ips"
-version = "1.2.0"
+version = "1.2.1"
 description = "Automatic prefix creation and an organization-aware IP network overview for NetBox 4.6"
 readme = "README.md"
 requires-python = ">=3.12"