Calculadora de subredes que funciona en consola, NO tiene entorno gráfico. Calcula todo tipo de redes y da información detallada.

Página oficial: http://www.routemeister.net/projects/sipcalc/

Ejemplo

$ sipcalc 10.20.30.33/26

-[ipv4 : 10.20.30.33/26] - 0

[CIDR]
Host address            - 10.20.30.33
Host address (decimal)  - 169090593
Host address (hex)      - A141E21
Network address         - 10.20.30.0
Network mask            - 255.255.255.192
Network mask (bits)     - 26
Network mask (hex)      - FFFFFFC0
Broadcast address       - 10.20.30.63
Cisco wildcard          - 0.0.0.63
Addresses in network    - 64
Network range           - 10.20.30.0 - 10.20.30.63
Usable range            - 10.20.30.1 - 10.20.30.62
-

Ayuda y parámetros

Usage: sipcalc [OPTIONS]... <[ADDRESS]... [INTERFACE]... | [-]>

Global options:

  -a, --all                     All possible information.
  -d, --resolve                 Enable name resolution.
  -h, --help                    Display this help.
  -I, --addr-int=INT            Added an interface.
  -n, --subnets=NUM             Display NUM extra subnets (starting from
                                the current subnet). Will display all subnets
                                in the current /24 if NUM is 0.
  -u, --split-verbose           Verbose split.
  -v, --version                 Version information.
  -4, --addr-ipv4=ADDR          Add an ipv4 address.
  -6, --addr-ipv6=ADDR          Add an ipv6 address.

IPv4 options:

  -b, --cidr-bitmap             CIDR bitmap.
  -c, --classfull-addr          Classfull address information.
  -i, --cidr-addr               CIDR address information. (default)
  -s, --v4split=MASK            Split the current network into subnets
                                of MASK size.
  -w, --wildcard                Display information for a wildcard
                                (inverse mask).
  -x, --classfull-bitmap        Classfull bitmap.

IPv6 options:

  -e, --v4inv6                  IPv4 compatible IPv6 information.
  -r, --v6rev                   IPv6 reverse DNS output.
  -S, --v6split=MASK            Split the current network into subnets
                                of MASK size.
  -t, --v6-standard             Standard IPv6. (default)

Address must be in the "standard" dotted quad format.

Netmask can be given in three different ways:

 - Number of bits    [/nn]
 - Dotted quad       [nnn.nnn.nnn.nnn]
 - Hex               [0xnnnnnnnn | nnnnnnnn]

Interface must be a valid network interface on the system.
If this options is used an attempt will be made to gain the address
and netmask from the specified interface.

Replacing address/interface with '-' will use stdin for reading further arguments.