net/sipcalc - The NetBSD Packages Collection

Sipcalc is an ip subnet calculator.  Features include:
- IPv4
  * Retrieving of address information from interfaces.
  * Classfull and CIDR output.
  * Multiple address and netmask input and output formats (dotted
    quad, hex, number of bits).
  * Output of broadcast address, network class, Cisco wildcard, hosts/range,
    network range.
  * The ability to "split" a network based on a smaller netmask, now also with
    recursive runs on the generated subnets. (also IPv6)
- IPv6
  * Compressed and expanded input and output addresses.
  * Standard IPv6 network output.
  * v4 in v6 output.
  * Reverse DNS address generation.