diff --git a/ncsid/src/normalize_ip.c b/ncsid/src/normalize_ip.c
new file mode 100644
index 0000000..107d29f
--- /dev/null
+++ b/ncsid/src/normalize_ip.c
@@ -0,0 +1,40 @@
+#include <arpa/inet.h>
+#include <stdio.h>
+
+int main(int argc, char* argv[])
+{
+    if (argc < 1)
+    {
+        return 1;
+    }
+    if (argc != 2)
+    {
+        fprintf(stderr, "Usage: %s <ip address>\n", argv[0]);
+        return 1;
+    }
+
+    union
+    {
+        struct in_addr in;
+        struct in6_addr in6;
+    } buf;
+    int af = AF_INET6;
+    if (inet_pton(af, argv[1], &buf) != 1)
+    {
+        af = AF_INET;
+        if (inet_pton(af, argv[1], &buf) != 1)
+        {
+            fprintf(stderr, "Invalid IP Address: %s\n", argv[1]);
+            return 2;
+        }
+    }
+
+    char str[INET6_ADDRSTRLEN];
+    if (inet_ntop(af, &buf, str, sizeof(str)) == NULL)
+    {
+        return 1;
+    }
+
+    printf("%s\n", str);
+    return 0;
+}