Section 1 · User commands

ipcalc.1

Package: ipcalc

IPCALC

NAME
SYNOPSIS
Description
Options
Examples
Authors
Reporting Bugs
Copyright

NAME

ipcalc − Perform simple operations on IP addresses and networks

SYNOPSIS

ipcalc [OPTION]… IP address[/prefix] [netmask]

Description

ipcalc provides a simple way to calculate IP information for a host or network. Depending on the options specified, it may be used to provide IP network information in human readable format, in a format suitable for parsing in scripts, generate random private addresses, resolve an IP address, or check the validity of an address.

By default or when the −−info or −−all−info parameters are specified the information provided is free form and human readable. Otherwise the output is JSON formatted when −j is specified, or when specific options are given (e.g., −−prefix) the output is in the VAR=VALUE format.

The various options specify what information ipcalc should display on standard output. Multiple options may be specified. It is required to specify an IP address; several operations require a netmask or a CIDR prefix as well.

Options


	•		−c, −−check Validate the IP address under the specified family.
	•		−i, −−info Display generic information on the provided network in human readable format. This is the default option if no other options are provided.
	•		−−all−info Display verbose information on the provided network and addresses in human readable format. That includes GeoIP information.
	•		−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”.
	•		−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.
	•		−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.
	•		−h, −−hostname Display the hostname for the given IP address. The variable exposed is HOSTNAME.
	•		−o, −−lookup−host Display the IP address for the given hostname. The variable exposed is ADDRESS.
	•		−4, −−ipv4 Explicitly specify the IPv4 address family.
	•		−6, −−ipv6 Explicitly specify the IPv6 address family.
	•		−b, −−broadcast Display the broadcast address for the given IP address and netmask. The variable exposed is BROADCAST (if available).
	•		−a, −−address Display the IP address for the given input. The variable exposed is ADDRESS (if available).
	•		−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).
	•		−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.
	•		−p, −−prefix Show the prefix for the given mask/IP address. The variable exposed is PREFIX.
	•		−−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.
	•		−n, −−network Display the network address for the given IP address and netmask. The variable exposed is NETWORK.
	•		−−reverse−dns Display the reverse DNS for the given IP address and netmask. The variable exposed is REVERSEDNS.
	•		−−minaddr Display the minimum host address in the provided network. The variable exposed is MINADDR.
	•		−−maxaddr Display the maximum host address in the provided network. The variable exposed is MAXADDR.
	•		−−addresses Display the number of host addresses in the provided network. The variable exposed is ADDRESSES.
	•		−−addrspace Display address space allocation information for the provided network. The variable exposed is ADDRSPACE.
	•		−−no−decorate Print only the requested information. That when combined with split networks option, will only print the networks without any additions for readability.
	•		−j, −−json When used with −i or −S, print the info as a JSON object instead of the usual output format.
	•		−s, −−silent Don’t ever display error messages.

Examples

Display all information of an IPv4

$ ipcalc −−all−info 193.92.150.2/24
Address: 193.92.150.2
Network: 193.92.150.0/24
Netmask: 255.255.255.0 = 24
Broadcast: 193.92.150.255
Reverse DNS: 150.92.193.in−addr.arpa.

Address space: Internet
Address class: Class C
HostMin: 193.92.150.1
HostMax: 193.92.150.254
Hosts/Net: 254

Country code: GR
Country: Greece

Display information in key-value format

$ ipcalc −pnmb −−minaddr −−maxaddr −−geoinfo −−addrspace 193.92.150.2/255.255.255.224
NETMASK=255.255.255.224
PREFIX=27
BROADCAST=193.92.150.31
NETWORK=193.92.150.0
MINADDR=193.92.150.1
MAXADDR=193.92.150.30
ADDRSPACE=“Internet”
COUNTRY=“Greece”

Display all information of an IPv6

$ ipcalc −−all−info 2a03:2880:20:4f06:face:b00c:0:14/64
Full Address: 2a03:2880:0020:4f06:face:b00c:0000:0014
Address: 2a03:2880:20:4f06:face:b00c:0:14
Full Network: 2a03:2880:0020:4f06:0000:0000:0000:0000/64
Network: 2a03:2880:20:4f06::/64
Netmask: ffff:ffff:ffff:ffff:: = 64
Reverse DNS: 6.0.f.4.0.2.0.0.0.8.8.2.3.0.a.2.ip6.arpa.

Address space: Global Unicast
HostMin: 2a03:2880:20:4f06::
HostMax: 2a03:2880:20:4f06:ffff:ffff:ffff:ffff
Hosts/Net: 2^(64) = 18446744073709551616

Country code: IE
Country: Ireland

Display JSON output

$ ipcalc −−all−info −j 2a03:2880:20:4f06:face:b00c:0:14/64
{
“FULLADDRESS”:“2a03:2880:0020:4f06:face:b00c:0000:0014”,
“ADDRESS”:“2a03:2880:20:4f06:face:b00c:0:14”,
“FULLNETWORK”:“2a03:2880:0020:4f06:0000:0000:0000:0000”,
“NETWORK”:“2a03:2880:20:4f06::”,
“NETMASK”:“ffff:ffff:ffff:ffff::”,
“PREFIX”:“64”,
“REVERSEDNS”:“6.0.f.4.0.2.0.0.0.8.8.2.3.0.a.2.ip6.arpa.”,
“ADDRSPACE”:“Global Unicast”,
“MINADDR”:“2a03:2880:20:4f06::”,
“MAXADDR”:“2a03:2880:20:4f06:ffff:ffff:ffff:ffff”,
“ADDRESSES”:“18446744073709551616”,
“COUNTRYCODE”:“IE”,
“COUNTRY”:“Ireland”,
“COORDINATES”:“53.000000,−8.000000”
}

Lookup of a hostname

$ ipcalc −−lookup−host localhost −−no−decorate
::1

IPv4 lookup of a hostname

$ ipcalc −−lookup−host localhost −−no−decorate −4
127.0.0.1

Reverse lookup of a hostname

$ ipcalc −h 127.0.0.1 −−no−decorate
localhost

Authors


	•		Nikos Mavrogiannopoulos n.mavrogiannopoulos@gmail.com
	•		Erik Troan ewt@redhat.com
	•		Preston Brown pbrown@redhat.com
	•		David Cantrell dcantrell@redhat.com

Reporting Bugs

Report bugs at https://gitlab.com/ipcalc/ipcalc/issues