ipcalc - Perform simple operations on IP addresses and networks

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−c, −−check Validate the IP address under the specified family.

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−i, −−info Display generic information on the provided network in human readable format. This is the default option if no other options are provided.

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−−all−info Display verbose information on the provided network and addresses in human readable format. That includes GeoIP information.

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−S, −−split Split the provided network using the specified prefix or netmask. That is, split up the network into smaller chunks of a specified prefix. When combined with no−decorate mode (−−no−decorate), the split networks will be printed in raw form. Example "ipcalc −S 26 192.168.1.0/24".

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−d, −−deaggregate Deaggregates the provided address range. That is, print the networks that cover the range. The range is given using the ´−´ separator, e.g., "192.168.1.3−192.168.1.23". When combined with no−decorate mode (−−no−decorate), the networks are printed in raw form.

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−r, −−random−private Generate a random private address using the supplied prefix or mask. By default it displays output in human readable format, but may be combined with other options (e.g., −−network) to display specific information in VAR=VALUE format.

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−h, −−hostname Display the hostname for the given IP address. The variable exposed is HOSTNAME.

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−o, −−lookup−host Display the IP address for the given hostname. The variable exposed is ADDRESS.

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−4, −−ipv4 Explicitly specify the IPv4 address family.

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−6, −−ipv6 Explicitly specify the IPv6 address family.

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−b, −−broadcast Display the broadcast address for the given IP address and netmask. The variable exposed is BROADCAST (if available).

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−a, −−address Display the IP address for the given input. The variable exposed is ADDRESS (if available).

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−g, −−geoinfo Display geographic information for the given IP address. This option requires libGeoIP/libmaxminddb to be available. The variables exposed are COUNTRYCODE, COUNTRY, CITY and COORDINATES (when available).

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−m, −−netmask Calculate the netmask for the given IP address. If no mask or prefix is provided, in IPv6 a 128−bit mask is assumed, while in IPv4 it assumes that the IP address is in a complete class A, B, or C network. Note, however, that many networks no longer use the default netmasks in IPv4. The variable exposed is NETMASK.

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−p, −−prefix Show the prefix for the given mask/IP address. The variable exposed is PREFIX.

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−−class−prefix Assign the netmask of the provided IPv4 address based on the address class. This was the default in previous versions of this software.

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−n, −−network Display the network address for the given IP address and netmask. The variable exposed is NETWORK.

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−−reverse−dns Display the reverse DNS for the given IP address and netmask. The variable exposed is REVERSEDNS.

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−−minaddr Display the minimum host address in the provided network. The variable exposed is MINADDR.

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−−maxaddr Display the maximum host address in the provided network. The variable exposed is MAXADDR.

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−−addresses Display the number of host addresses in the provided network. The variable exposed is ADDRESSES.

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−−addrspace Display address space allocation information for the provided network. The variable exposed is ADDRSPACE.

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−−no−decorate Print only the requested information. That when combined with split networks option, will only print the networks without any additions for readability.

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−j, −−json When used with −i or −S, print the info as a JSON object instead of the usual output format.

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−s, −−silent Don´t ever display error messages.

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Nikos Mavrogiannopoulos [email protected]

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Erik Troan [email protected]

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Preston Brown [email protected]

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David Cantrell [email protected]