README

Author: Relkci

README.md

@@ -14,6 +14,8 @@ This script reads a file containing IPv4 CIDR notations or individual IP address
 - Excludes network and broadcast addresses from the host count
 - Ignores empty lines and lines starting with `#`
 - Warns about invalid lines with a descriptive message
+- Identifies duplicates (-D to list hosts appearing in multiple files)
+- Calculates RFC1918 private vs public host counts (-r)
 
 ## Usage
 
@@ -24,4 +26,14 @@ Python 3.6+
 ### Command
 
 ```bash
-python HostCount.py path/to/cidrs.txt
+python HostCount.py -d path/to/cidrs.txt
+```
+
+### 
+Optional flags:
+- `-D`, `--duplicates`  
+  When processing a directory, list hosts that appear in more than one file and which files they appear in.
+
+- `-r`, `--rfc1918`  
+  Show how many hosts are in RFC1918 private address space vs how many are not (prints per-file and totals).
+