diff --git a/update-record.py b/update-record.py
index 67c4fcc..ea075e4 100755
--- a/update-record.py
+++ b/update-record.py
@@ -65,10 +65,21 @@
 		print('subdomain id: ' + str(subId))
 	# end if
 
-	if (subId < 0):
-		ret = inwx_conn.nameserver.createRecord({'domain': domain, 'name': sub, 'type': args.record_type, 'content': str(args.content), 'ttl': args.ttl})
+	if (args.delete):
+		if (subId < 0):
+			raise RuntimeError("Can not delete unexisting entry.")
+		else:
+			if (verbose):
+				print ("delete id: " + str(subId))
+			# end if
+			ret = inwx_conn.nameserver.deleteRecord({'id': subId})
+		# end if
 	else:
-		ret = inwx_conn.nameserver.updateRecord({'id': subId, 'type': args.record_type, 'content': str(args.content), 'ttl': args.ttl})
+		if (subId < 0):
+			ret = inwx_conn.nameserver.createRecord({'domain': domain, 'name': sub, 'type': args.record_type, 'content': str(args.content), 'ttl': args.ttl})
+		else:
+			ret = inwx_conn.nameserver.updateRecord({'id': subId, 'type': args.record_type, 'content': str(args.content), 'ttl': args.ttl})
+		# end if
 	# end if
 
 	if (verbose):
@@ -82,8 +93,9 @@
 	parser = argparse.ArgumentParser(description='inwx subdomain update')
 
 	parser.add_argument('domain', metavar='domain', help='full domain like subdomain.example.com')
-	parser.add_argument('content', metavar='content', help='ip or string to fill into sub domain entry')
+	parser.add_argument('content', metavar='content', nargs='?', default=None, help='ip or string to fill into sub domain entry')
 	parser.add_argument('-r', '--record-type', metavar='type', required=True, choices=['A', 'AAAA', 'TXT', 'CNAME'], help='record type (A, AAAA, TXT, CNAME)')
+	parser.add_argument('--delete', action='store_true', required=False, help='delete existing record')
 
 	parser.add_argument('-c', '--config_file', metavar='path', default='./conf.cfg', help='path to configuration file')
 	parser.add_argument('-t', '--ttl', default=3600, type=int, help='TTL (time to live) of the nameserver record in seconds (default 3600)')
@@ -94,6 +106,12 @@
 
 	args = parser.parse_args()
 
+
+	# check if content is needed
+	if (not args.delete and not args.content):
+		raise ValueError("Missing content for domain entry.")
+	# end if
+
 	if (args.debug):
 		main(args)
 	else: