diff --git a/reverse.py b/reverse.py
new file mode 100644
index 0000000..a7461f9
--- /dev/null
+++ b/reverse.py
@@ -0,0 +1,44 @@
+import ipaddress
+
+def reverse_zone(network):
+    """Reverse a network zone"""
+
+    if network.version == 4:
+        boundary = 8  # break to the byte
+    elif network.version == 6:
+        boundary = 4  # break to the nimble
+
+    assert network.prefixlen % boundary == 0
+    length = (network.prefixlen // boundary)
+
+    full_network_reverse = network.network_address.reverse_pointer
+
+    splitted = full_network_reverse.split(".")
+    splitting_len = int(network.max_prefixlen / boundary)
+    splitted = splitted[splitting_len - length:]
+
+    reversed_zone = ".".join(splitted)
+
+    return reversed_zone
+
+
+net1 = ipaddress.IPv4Network("10.128.12.0/24")
+net2 = ipaddress.IPv4Network("10.129.0.0/16")
+net3 = ipaddress.IPv4Network("10.0.0.0/8")
+
+net4 = ipaddress.IPv6Network("2001:470:142:3::/64")
+net5 = ipaddress.IPv6Network("2001:470:142::/48")
+net6 = ipaddress.IPv6Network("2a09:6840::/32")
+
+#>>> reverse_zone(net1)
+#'12.128.10.in-addr.arpa'
+#>>> reverse_zone(net2)
+#'129.10.in-addr.arpa'
+#>>> reverse_zone(net3)
+#'10.in-addr.arpa'
+#>>> reverse_zone(net4)
+#'3.0.0.0.2.4.1.0.0.7.4.0.1.0.0.2.ip6.arpa'
+#>>> reverse_zone(net5)
+#'2.4.1.0.0.7.4.0.1.0.0.2.ip6.arpa'
+#>>> reverse_zone(net6)
+#'0.4.8.6.9.0.a.2.ip6.arpa'