SlackBuildsOrg/network/sipcalc
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README
sipcalc.info
sipcalc.SlackBuild
slack-desc

sipcalc (advanced console based ip subnet calculator)

Sipcalc is an ip subnet calculator. Sipcalc, in its simplest form
takes an ip-address and a subnet mask on the commandline and outputs
information about the subnet. Sipcalc has support for both IPv4
and IPv6 addresses.