Simple python to count hosts in a list of subnets and ip addresses
This script reads a file containing IPv4 CIDR notations or individual IP addresses and calculates the total number of valid hosts. It excludes network and broadcast addresses for subnets, but counts single IPs (e.g., 10.0.0.5) as one valid host.
- Accepts a file containing:
- IPv4 CIDR ranges (e.g.,
192.168.1.0/24) - Individual IP addresses (e.g.,
10.0.0.5)
- IPv4 CIDR ranges (e.g.,
- Excludes network and broadcast addresses from the host count
- Ignores empty lines and lines starting with
# - Warns about invalid lines with a descriptive message
Python 3.6+
python HostCount.py path/to/cidrs.txt