Sipcalc is an console based ip subnet calculator with IPv4 and IPv6 support.

Sipcalc development started back in 2001 and has most of the features I want in an ip calculator. It is no longer under active development, though bugfixes and patches are accepted.

Sipcalc is available in many Linux/BSD distributions, usually as a package named sipcalc. Release tarballs are available from http://www.routemeister.net/

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Features include:

• IPv4
  • Multiple address and netmask input formats.
  • Retrieving of address information from interfaces.
  • Classfull and CIDR output.
  • Multiple address and netmask output formats (dotted quad, hex, number of bits).
  • Output of broadcast address, network class, Cisco wildcard, hosts/range, network range.
  • Output of multiple types of bitmaps.
  • Output of a userdefined number of extra networks.
  • Multiple networks input from commandline.
  • Parsing of a newline seperated list of networks from standard input (STDIN).
  • The ability to "split" a network based on a smaller netmask, now also with recursive runs on the generated subnets.
  • DNS resolution.
• IPv6
  • Compressed and expanded input addresses.
  • Compressed and expanded output.
  • Standard IPv6 network output.
  • v4 in v6 output.
  • Reverse dns address generation.
  • The ability to "split" a network based on a smaller netmask, now also with recursive runs on the generated subnets.
  • DNS resolution.

Sipcalc has been tested on the following platforms.

• OpenBSD 3.0 (i386)
• OpenBSD 2.8 (i386)
• FreeBSD 4.3 (i386)
• Compaq Tru64 UNIX V5.0A (Alpha)
• Compaq Tru64 UNIX V5.1 (Alpha)
• Debian GNU/Linux 2.2 (Linux kernel 2.2.x) (i386)
• Debian GNU/Linux 2.4(?) (Linux kernel 2.4.x) (i386)
• Debian GNU/Linux 2.2 (Linux kernel 2.2.x) (Alpha)
• Debian GNU/Linux 2.2 (Linux kernel 2.2.x) (Sparc - Ultra60)
• Sun Solaris (8) (Sparc - R220)

See doc/sipcalc.txt for a complete description of sipcalc commandline-version arguments.