---
name: "ipcalc-ng"
section: "1"
platform: "linux"
package: "ipcalc-ng"
version: "1.0.3-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ipcalc-ng"
---

# ipcalc-ng(1)

Perform simple operations on IP addresses and networks

## NAME

**ipcalc-ng** - Perform simple operations on IP addresses and networks

## SYNOPSIS

**ipcalc-ng** \[OPTION\]... *IP address*\[/prefix\] \[netmask\]

## Description

**ipcalc-ng** 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-ng** 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-ng -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-ng --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-ng -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-ng --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-ng --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-ng --lookup-host localhost --no-decorate
::1
```

### IPv4 lookup of a hostname

```
$ ipcalc-ng --lookup-host localhost --no-decorate -4
127.0.0.1
```

### Reverse lookup of a hostname

```
$ ipcalc-ng -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

## Copyright

Copyright © 1997-2020 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.