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IPCalc vs Netsleuth: catalog facts
IPCalc	Netsleuth
Free Free and open source under GPL-3.0-only.	Free Free and open source under the GPL-3.0-or-later licence.
Android	Linux, Command line
Calculates network and broadcast addresses Converts IP addresses to binary	Focused tool for subnet calculations Graphical app and command-line interface in one package
Geolocation identifies the country and possibly the city associated with an IP address.	Linux only Command-line use requires adding a shell alias for the Flatpak
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 1, 2026

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