CIDR Utility

Phase 1 - CIDR to IP range conversion

Create a Python script that receives a CIDR subnet and outputs the corresponding IP range in a human-readable format.

• Input a CIDR subnet (e.g., 172.16.0.0/12)
• Calculate the first and last IP addresses in the range
• Display the range in readable format

Functional result: Script outputs correct start and end IP addresses for any valid CIDR subnet.

Phase 2 - IP membership verification

Extend the script to optionally check if a specific IP belongs to the given CIDR range.

• Accept an IP address as a second argument
• Verify whether the IP is within the subnet range
• Output True or False accordingly

Functional result: Script correctly indicates whether a given IP belongs to the specified CIDR range.