Class C Ip Checker

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Class C Ip Checker

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About Class C Ip Checker

A Class C IP Checker tool is designed to determine if multiple IP addresses belong to the same Class C subnet. Class C networks are traditionally identified by the first three octets of the IP address, and they allow for up to 254 hosts on each network.

Here’s a detailed overview of how such a tool works:

Step-by-Step Process

1. User Input:

  • The user provides a list of IP addresses to be checked.

2. Extracting the Class C Subnet:

  • For each IP address, the tool extracts the first three octets, which represent the Class C subnet. For example, in the IP address ``, the Class C subnet is `192.168.1`.

3. Grouping IP Addresses:

  • The tool groups the IP addresses based on their Class C subnet.

4. Displaying the Results:

  • The tool displays the groups of IP addresses that belong to the same Class C subnet.
  • It also indicates which IP addresses do not belong to the same subnet.


  • Extracting the Class C Subnet:
  1. The `extract_class_c_subnet` function takes an IP address as input and returns the first three octets joined by dots, representing the Class C subnet.
  • Grouping IP Addresses:
  1. The `group_ips_by_class_c` function takes a list of IP addresses, extracts their Class C subnets, and groups the IP addresses accordingly.
  2. A dictionary is used to store the groups, where the keys are the Class C subnets and the values are lists of IP addresses belonging to those subnets.
  • Displaying the Results:
  1. The example usage demonstrates how to use the grouping function and prints the grouped IP addresses.

Advanced Features

  • Validation: Checking if the provided IP addresses are valid before processing.
  • Subnet Mask Customization: Allowing users to specify custom subnet masks instead of assuming Class C.
  • CIDR Notation Support: Supporting CIDR notation to determine subnet membership more flexibly.
  • Detailed Reports: Providing detailed reports that can be exported to formats like CSV or JSON.
  • Integration with Other Tools: Integrating with network management or security tools for comprehensive analysis.

Practical Applications

  1. Network Management: Helping network administrators manage and verify IP address allocations within a network.
  2. Security Audits: Assisting in security audits by identifying IP addresses within the same subnet that may be vulnerable.
  3. SEO Analysis: In the context of SEO, ensuring that multiple websites hosted on the same server do not share the same Class C subnet, which can affect search engine rankings.

By following these steps and implementing the features outlined above, a Class C IP Checker tool can effectively group and analyze IP addresses based on their Class C subnets, providing valuable insights for network management, security, and other related tasks.