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SubNetCalcipcalc
Free

Free under the GPL license.

 Free

Free and open source under the GPL.

Command line Linux, Command line
  • Calculates IPv4 and IPv6 network details
  • Displays addresses in binary
  • Handles IPv4 and IPv6 with machine-readable output for scripting
  • Removes an entire class of subnetting arithmetic mistakes
  • Command-line interface
  • Several unrelated programs share the name ipcalc, which causes confusion
  • Command line only
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0-or-later License: GPL-2.0
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 8, 2026

Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.