diff --git a/meshtastic/__main__.py b/meshtastic/__main__.py
index ee869e9..2641043 100644
--- a/meshtastic/__main__.py
+++ b/meshtastic/__main__.py
@@ -350,6 +350,26 @@ def onConnected(interface):
                 print(f"Setting device owner short to {args.set_owner_short}")
             interface.getNode(args.dest, False, **getNode_kwargs).setOwner(long_name=args.set_owner, short_name=args.set_owner_short)
 
+        if args.set_is_unmessageable:
+            closeNow = True
+            waitForAckNak = True
+            print(f"Setting is_unmessagable to {args.set_is_unmessageable}")
+            if isinstance(args.set_is_unmessageable, str):
+                val = meshtastic.util.fromStr(args.set_is_unmessageable)
+            else:
+                val = args.set_is_unmessageable
+            interface.getNode(args.dest, **getNode_kwargs).setIsUnmessageable(is_unmessagable=val)
+
+        if args.set_is_unmessagable:
+            closeNow = True
+            waitForAckNak = True
+            print(f"Setting is_unmessagable to {args.set_is_unmessageable}")
+            if isinstance(args.set_is_unmessageable, str):
+                val = meshtastic.util.fromStr(args.set_is_unmessageable)
+            else:
+                val = args.set_is_unmessageable
+            interface.getNode(args.dest, **getNode_kwargs).setIsUnmessageable(is_unmessagable=val)
+
         # TODO: add to export-config and configure
         if args.set_canned_message:
             closeNow = True
@@ -1540,6 +1560,13 @@ def addConfigArgs(parser: argparse.ArgumentParser) -> argparse.ArgumentParser:
         "--set-ham", help="Set licensed Ham ID and turn off encryption", action="store"
     )
 
+    group.add_argument(
+        "--set-is-unmessageable", help="Set if a node is messageable or not", action="store"
+    )
+
+    group.add_argument(
+        "--set-is-unmessagable", help="Set if a node is messageable or not", action="store"
+)
     group.add_argument(
         "--ch-set-url", "--seturl",
         help="Set all channels and set LoRa config from a supplied URL",
diff --git a/meshtastic/node.py b/meshtastic/node.py
index e54963c..934a65a 100644
--- a/meshtastic/node.py
+++ b/meshtastic/node.py
@@ -326,6 +326,23 @@ class Node:
         else:
             onResponse = self.onAckNak
         return self._sendAdmin(p, onResponse=onResponse)
+    
+    def setIsUnmessageable(self, is_unmessagable: Optional[bool]=False):
+        """Set if a device is messagable or not"""
+        self.ensureSessionKey()
+        p = admin_pb2.AdminMessage()
+
+        if is_unmessagable is not None:
+            p.set_owner.is_unmessagable = is_unmessagable
+
+        # Note: These debug lines are used in unit tests
+        logging.debug(f"p.set_owner.is_unmessageable:{p.set_owner.is_unmessagable}:")
+        # If sending to a remote node, wait for ACK/NAK
+        if self == self.iface.localNode:
+            onResponse = None
+        else:
+            onResponse = self.onAckNak
+        return self._sendAdmin(p, onResponse=onResponse)
 
     def getURL(self, includeAll: bool = True):
         """The sharable URL that describes the current channel"""