SubNetCalc
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| File:Screenshot of SubNetCalc.png | |
| Other names | IPv4/IPv6 Subnet Calculator |
|---|---|
| Original author(s) | Thomas Dreibholz |
| Developer(s) | Thomas Dreibholz, Simula Research Laboratory, Simula Metropolitan Center for Digital Engineering |
| Initial release | January 30, 2009[1] |
| Stable release | 2.6.6[2]
/ April 19, 2026 |
| Repository | github |
| Written in | C++ |
| Engine | |
| Operating system | Linux, FreeBSD, MacOS |
| Platform | cross-platform |
| Available in | 4 languages |
List of languages | |
| Type | IP network utility |
| License | GPL-3.0-or-later |
| Website | www |
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SubNetCalc is an open-source IPv4 and IPv6 subnet address calculator. It is distributed in several major software distributions, including Debian[3], Ubuntu[4], and FreeBSD[5].
Features
SubNetCalc calculates a breakdown of IP network information. It provides:
- Address Analysis: Calculates the network address, broadcast address (IPv4), host address range, and the maximum number of hosts for a given subnet.
- Binary Visualization: Displays addresses in binary format, highlighting the network and host portions.
- Address Classification: Identifies address types and scopes, such as multicast, unique local (ULA), and link-local.
- Unique Local Prefix Generation: Can generate randomly chosen IPv6 Unique Local prefixes according to RFC 4193, using /dev/random or /dev/urandom for entropy.[6]
- Hostname Resolution: Supports resolving hostnames (including Internationalized Domain Names) to IP addresses before performing calculations.
- Geo-Location: Integration with MaxMind GeoIP library to identify the country associated with a given IP address.
Components and Integration
The tool is portable and is maintained as part of the FreeBSD Ports collection and the Debian/Ubuntu package repositories. It also features bash shell-completion support.
See also
References
- ↑ "Initial Git commit". Thomas Dreibholz. Retrieved 2026-04-29.
- ↑ "SubNetCalc Homepage". Thomas Dreibholz. Retrieved 2026-04-29.
- ↑ "SubNetCalc package tracker". Debian Project. Retrieved 2026-04-29.
- ↑ "SubNetCalc source package in Ubuntu". Canonical Ltd. Retrieved 2026-04-29.
- ↑ "SubNetCalc on FreshPorts". FreshPorts. Retrieved 2026-04-29.
- ↑ "SubNetCalc Ubuntu Manpage". Canonical Ltd. Retrieved 2026-04-29.
External links
This article "SubNetCalc" is from Wikipedia. The list of its authors can be seen in its historical and/or the page Edithistory:SubNetCalc. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.
