How to Calculate IP Subnet Address with ipcalc Tool

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Marin Todorov

I am a bachelor in computer science and a Linux Foundation Certified System Administrator. Currently working as a Senior Technical support in the hosting industry. In my free time I like testing new software and inline skating.

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4 Responses

  1. spezialist says:

    I agree, a good tutorial, but there is one sad nuance: under RHEL/CentOS, the functionality of the ipcalc utility is very limited :-(. Because of this, all the above mentioned practical examples of using the ipcalc utility are not applicable under RHEL/CentOS.

    # rpm -q initscripts
    # ipcalc
    Usage: ipcalc [OPTION...]
      -c, --check         Validate IP address for specified address family
      -4, --ipv4          IPv4 address family (default)
      -6, --ipv6          IPv6 address family
      -b, --broadcast     Display calculated broadcast address
      -h, --hostname      Show hostname determined via DNS
      -m, --netmask       Display default netmask for IP (class A, B, or C)
      -n, --network       Display network address
      -p, --prefix        Display network prefix
      -s, --silent        Don't ever display error messages
    Help options:
      -?, --help          Show this help message
      --usage             Display brief usage message
  2. Stefan Lasiewski says:

    Great tutorial, thanks. From the comments that I read on Facebook, many people would have benefited from an example that showed a couple of uncommon networks, such as, instead of a /24.

    Thanks for working on this.

  3. Allwin says:

    Do you have similar tool for windows based machines.

    • Stefan Lasiewski says:

      Download Windows Subsystem for Linux, install Ubuntu, and not only will you get ipcalc but you’ll get Ubuntu’s powerful Bash environment.

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