ipcalc - Unix, Linux Command

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ipcalc - perform simple manipulation of IP addresses


ipcalc [OPTION]... <IP address>[/prefix] [netmask]


ipcalc provides a simple way to calculate IP information for a host. The various options specify what information ipcalc should display on standard out. Multiple options may be specified. An IP address to operate on must always be specified. Most operations also require a netmask or a CIDR prefix as well.


-c, --check
  Validate the IP address under the specified family. If no address family is specified, IPv4 is assumed.

-4, --ipv4 Specify IPv4 address family (default).

-6, --ipv6 Specify IPv6 address family.

-b, --broadcast
  Display the broadcast address for the given IP address and netmask.

-h, --hostname
  Display the hostname for the given IP address.

-m, --netmask
  Calculate the netmask for the given IP address. It assumes that the IP address is in a complete class A, B, or C network. Many networks do not use the default netmasks, in which case an inappropriate value will be returned.

-p, --prefix
  Show the prefix for the given mask/IP address.

-n, --network
  Display the network address for the given IP address and netmask.

-s, --silent
  Don’t ever display error messages.


Erik Troan <ewt@redhat.com>
Preston Brown <pbrown@redhat.com>

IPv6 supported wedged in by David Cantrell <dcantrell@redhat.com>


Report bugs at http://bugzilla.redhat.com/


Copyright © 1997-2008 Red Hat, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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