diff --git a/src/infuse_iot/database.py b/src/infuse_iot/database.py
index ee7934e..e32e0d6 100644
--- a/src/infuse_iot/database.py
+++ b/src/infuse_iot/database.py
@@ -112,7 +112,7 @@ def _network_key(self, network_id: int, interface: bytes, gps_time: int) -> byte
             try:
                 info = load_network(network_id)
             except FileNotFoundError:
-                raise UnknownNetworkError from None
+                raise UnknownNetworkError(network_id) from None
             self._network_keys[network_id] = info["key"]
         base = self._network_keys[network_id]
         time_idx = gps_time // (60 * 60 * 24)
diff --git a/src/infuse_iot/tools/native_bt.py b/src/infuse_iot/tools/native_bt.py
index b385758..0ac6565 100644
--- a/src/infuse_iot/tools/native_bt.py
+++ b/src/infuse_iot/tools/native_bt.py
@@ -18,7 +18,7 @@
 
 from infuse_iot.commands import InfuseCommand
 from infuse_iot.common import InfuseBluetoothUUID, InfuseType
-from infuse_iot.database import DeviceDatabase
+from infuse_iot.database import DeviceDatabase, UnknownNetworkError
 from infuse_iot.epacket import interface
 from infuse_iot.epacket.packet import (
     Auth,
@@ -65,7 +65,10 @@ def __init__(self, database: DeviceDatabase, server: LocalServer, bleak_mapping:
         self._tasks: dict[int, asyncio.Task] = {}
 
     def notification_handler(self, _characteristic: BleakGATTCharacteristic, data: bytearray):
-        hdr, decr = CtypeBtGattFrame.decrypt(self._db, None, bytes(data))
+        try:
+            hdr, decr = CtypeBtGattFrame.decrypt(self._db, None, bytes(data))
+        except UnknownNetworkError:
+            return
         # Correct values are annoying to get here
         if_addr = interface.Address(interface.Address.BluetoothLeAddr(0, 0))
         rssi = 0
@@ -193,6 +196,7 @@ def __init__(self, args: argparse.Namespace):
         self.database = DeviceDatabase()
         self.server = LocalServer(default_multicast_address())
         self.bleak_mapping: dict[int, BLEDevice] = {}
+        self.unknown_networks: set[int] = set()
         Console.init()
 
     async def server_handler(self):
@@ -215,7 +219,14 @@ def simple_callback(self, device: BLEDevice, data: AdvertisementData):
         rssi = data.rssi
         payload = data.manufacturer_data[self.infuse_manu]
 
-        hdr, decr = CtypeBtAdvFrame.decrypt(self.database, addr.val, payload)
+        try:
+            hdr, decr = CtypeBtAdvFrame.decrypt(self.database, addr.val, payload)
+        except UnknownNetworkError as e:
+            network_id = e.args[0]
+            if network_id not in self.unknown_networks:
+                self.unknown_networks.add(network_id)
+                Console.log_info(f"Unknown network 0x{network_id:06x}")
+            return
         self.bleak_mapping[hdr.device_id] = device
 
         hop = HopReceived(