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ipcalcipv6calc
Free

Free and open source under the GPL.

 Free

Free and open source under the GNU GPL version 2.

Linux, Command line Linux, Command line
  • Handles IPv4 and IPv6 with machine-readable output for scripting
  • Removes an entire class of subnetting arithmetic mistakes
  • Converts and calculates IPv4 and IPv6 address information
  • Includes tools for log conversion, anonymization and statistics
  • Several unrelated programs share the name ipcalc, which causes confusion
  • Command line only
  • Some database features require separately stored databases or optional libraries
  • The project notes that the C program may have security weaknesses
Downloadable app Downloadable app
Open source Open source
License: GPL-2.0 License: GPL-2.0-only
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 September 22, 2026

Checked October 8, 2026

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