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NetsleuthIPCalc
Free

Free and open source under the GPL-3.0-or-later licence.

 Free

Free and open source under GPL-3.0-only.

Linux, Command line Android
  • Focused tool for subnet calculations
  • Graphical app and command-line interface in one package
  • Calculates network and broadcast addresses
  • Converts IP addresses to binary
  • Linux only
  • Command-line use requires adding a shell alias for the Flatpak
  • Geolocation identifies the country and possibly the city associated with an IP address.
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0-or-later License: GPL-3.0-only
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked October 1, 2026

Checked October 8, 2026

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