IPCALC(1) IPCALC(1) 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 net- work. Depending on the options specified, it may be used to provide IP net- work 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 stan- dard 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 ad- dresses 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 speci- fied 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 sup- plied 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 vari- able 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 vari- ables 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 vari- able 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 net- mask. 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 net- work. The variable exposed is ADDRESSES. * --addrspace Display address space allocation information for the pro- vided 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 in- stead 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 Copyright Copyright A(C) 1997-2020 Red Hat, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MER- CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. June 2023 IPCALC(1)
NAME | SYNOPSIS | Description | Options | Examples | Authors | Reporting Bugs | Copyright
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