Classify an IP address, get network address, and related information (CLI).

Run this on: OnlineGDB

$ python main.py

# Enter an IP address: 192.168.1.20
# Enter subnet mask: 255.255.255.0
# IP Address: 192.168.1.20
# IP Class: C
# Subnet Mask: 255.255.255.0
# Network Address: 192.168.1.0
# Broadcast Address: 192.168.1.255
# First Usable Host: 192.168.1.1
# Last Usable Host: 192.168.1.254
# Is Private: True