Compare software

Netsleuth vs ipcalc: catalog facts
Netsleuth	ipcalc
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source under the GPL.
Linux, Command line	Linux, Command line
Focused tool for subnet calculations Graphical app and command-line interface in one package	Handles IPv4 and IPv6 with machine-readable output for scripting Removes an entire class of subnetting arithmetic mistakes
Linux only Command-line use requires adding a shell alias for the Flatpak	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
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 22, 2026

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