diff --git a/kjg/IPv6/overlap.py b/kjg/IPv6/overlap.py
new file mode 100644
index 0000000..1ded373
--- /dev/null
+++ b/kjg/IPv6/overlap.py
@@ -0,0 +1,21 @@
+from sys import argv
+import ipaddress
+
+# read the argument how to run this
+try:
+    script, ip1, ip2 = argv
+    a = ip1.split('/')
+    b = ip2.split('/')
+    
+    a = ipaddress.ip_network(a[0]).supernet(new_prefix=int(a[1]))
+    b = ipaddress.ip_network(b[0]).supernet(new_prefix=int(b[1]))
+
+    test1 = ipaddress.IPv6Network(a).overlaps(ipaddress.IPv6Network(b))
+
+    if test1 :
+        print("overlap")
+    else:
+        print("no overlap")
+        
+except:
+    print("wrong inpit")