cidrcheck

simple python script to check if the given IP belong to the CIDR provided.

This script will check if a given IP address belong to the subnet range provided in CIDR (classless inter-domain routing) notation. This was asked as an interview question.

How to use the script: This script uses two switches (-i, -c)

1. with -i switch, the script returns the range and number of IPs in the subnet.

  		cidrcheck.py  -i 10.32.55.12/17
  		FIRST IP     : 10.32.0.0
  		LAST  IP     : 10.32.127.255
  		NMASK IP     : 255.255.128.0
  		TOTAL IPs    : 32768

2. with -i and -c switch, the script checks if the given ip in -c belong to the range provided in -i ex:

  		 cidrcheck.py  -i 10.32.55.12/17 -c 10.28.55.12
  		 FIRST IP     : 10.32.0.0
  		 LAST  IP     : 10.32.127.255
  		 NMASK IP     : 255.255.128.0
  		 TOTAL IPs    : 32768
  		 IP does not belong to the subnet.