1IPCALC(1) General Commands Manual IPCALC(1)
2
6 ipcalc - Perform simple operations on IP addresses and networks
7
9 ipcalc [OPTION]... IP address[/prefix] [netmask]
10
12 ipcalc provides a simple way to calculate IP information for a host or
13 network. Depending on the options specified, it may be used to provide
14 IP network information in human readable format, in a format suitable
15 for parsing in scripts, generate random private addresses, resolve an
16 IP address, or check the validity of an address.
17 By default or when the --info or --all-info parameters are specified
19 the information provided is free form and human readable. Otherwise the
20 output is JSON formatted when -j is specified, or when specific options
21 are given (e.g., --prefix) the output is in the VAR=VALUE format.
22 The various options specify what information ipcalc should display on
24 standard output. Multiple options may be specified. It is required to
25 specify an IP address; several operations require a netmask or a CIDR
26 prefix as well.
27
29 ○ -c, --check Validate the IP address under the specified family.
30 ○ -i, --info Display generic information on the provided network in
32 human readable format. This is the default option if no other op‐
33 tions are provided.
34 ○ --all-info Display verbose information on the provided network and
36 addresses in human readable format. That includes GeoIP informa‐
37 tion.
38 ○ -S, --split Split the provided network using the specified prefix
40 or netmask. That is, split up the network into smaller chunks of a
41 specified prefix. When combined with no-decorate mode (--no-deco‐
42 rate), the split networks will be printed in raw form. Example "ip‐
43 calc -S 26 192.168.1.0/24".
44 ○ -d, --deaggregate Deaggregates the provided address range. That is,
46 print the networks that cover the range. The range is given using
47 the ´-´ separator, e.g., "192.168.1.3-192.168.1.23". When combined
48 with no-decorate mode (--no-decorate), the networks are printed in
49 raw form.
50 ○ -r, --random-private Generate a random private address using the
52 supplied prefix or mask. By default it displays output in human
53 readable format, but may be combined with other options (e.g.,
54 --network) to display specific information in VAR=VALUE format.
55 ○ -h, --hostname Display the hostname for the given IP address. The
57 variable exposed is HOSTNAME.
58 ○ -o, --lookup-host Display the IP address for the given hostname.
60 The variable exposed is ADDRESS.
61 ○ -4, --ipv4 Explicitly specify the IPv4 address family.
63 ○ -6, --ipv6 Explicitly specify the IPv6 address family.
65 ○ -b, --broadcast Display the broadcast address for the given IP ad‐
67 dress and netmask. The variable exposed is BROADCAST (if avail‐
68 able).
69 ○ -a, --address Display the IP address for the given input. The vari‐
71 able exposed is ADDRESS (if available).
72 ○ -g, --geoinfo Display geographic information for the given IP ad‐
74 dress. This option requires libGeoIP/libmaxminddb to be available.
75 The variables exposed are COUNTRYCODE, COUNTRY, CITY and COORDI‐
76 NATES (when available).
77 ○ -m, --netmask Calculate the netmask for the given IP address. If no
79 mask or prefix is provided, in IPv6 a 128-bit mask is assumed,
80 while in IPv4 it assumes that the IP address is in a complete class
81 A, B, or C network. Note, however, that many networks no longer use
82 the default netmasks in IPv4. The variable exposed is NETMASK.
83 ○ -p, --prefix Show the prefix for the given mask/IP address. The
85 variable exposed is PREFIX.
86 ○ --class-prefix Assign the netmask of the provided IPv4 address
88 based on the address class. This was the default in previous ver‐
89 sions of this software.
90 ○ -n, --network Display the network address for the given IP address
92 and netmask. The variable exposed is NETWORK.
93 ○ --reverse-dns Display the reverse DNS for the given IP address and
95 netmask. The variable exposed is REVERSEDNS.
96 ○ --minaddr Display the minimum host address in the provided network.
98 The variable exposed is MINADDR.
99 ○ --maxaddr Display the maximum host address in the provided network.
101 The variable exposed is MAXADDR.
102 ○ --addresses Display the number of host addresses in the provided
104 network. The variable exposed is ADDRESSES.
105 ○ --addrspace Display address space allocation information for the
107 provided network. The variable exposed is ADDRSPACE.
108 ○ --no-decorate Print only the requested information. That when com‐
110 bined with split networks option, will only print the networks
111 without any additions for readability.
112 ○ -j, --json When used with -i or -S, print the info as a JSON object
114 instead of the usual output format.
115 ○ -s, --silent Don´t ever display error messages.
117
121 Display all information of an IPv4
122 ``` $ ipcalc --all-info 193.92.150.2/24 Address: 193.92.150.2 Network:
123 193.92.150.0/24 Netmask: 255.255.255.0 = 24 Broadcast: 193.92.150.255
124 Reverse DNS: 150.92.193.in-addr.arpa.
125 Address space: Internet Address class: Class C HostMin: 193.92.150.1
127 HostMax: 193.92.150.254 Hosts/Net: 254
128 Country code: GR Country: Greece ```
130 Display information in key-value format
132 $ ipcalc -pnmb --minaddr --maxaddr --geoinfo --addrspace
133 193.92.150.2/255.255.255.224 NETMASK=255.255.255.224 PREFIX=27 BROAD‐
134 CAST=193.92.150.31 NETWORK=193.92.150.0 MINADDR=193.92.150.1 MAX‐
135 ADDR=193.92.150.30 ADDRSPACE="Internet" COUNTRY="Greece"
136 Display all information of an IPv6
138 ``` $ ipcalc --all-info 2a03:2880:20:4f06:face:b00c:0:14/64 Full Ad‐
139 dress: 2a03:2880:0020:4f06:face:b00c:0000:0014 Address:
140 2a03:2880:20:4f06:face:b00c:0:14 Full Network:
141 2a03:2880:0020:4f06:0000:0000:0000:0000/64 Network:
142 2a03:2880:20:4f06::/64 Netmask: ffff:ffff:ffff:ffff:: = 64 Reverse DNS:
143 6.0.f.4.0.2.0.0.0.8.8.2.3.0.a.2.ip6.arpa.
144 Address space: Global Unicast HostMin: 2a03:2880:20:4f06:: HostMax:
146 2a03:2880:20:4f06:ffff:ffff:ffff:ffff Hosts/Net: 2^(64) =
147 18446744073709551616
148 Country code: IE Country: Ireland ```
150 Display JSON output
152 $ ipcalc --all-info -j 2a03:2880:20:4f06:face:b00c:0:14/64 { "FULLAD‐
153 DRESS":"2a03:2880:0020:4f06:face:b00c:0000:0014", "AD‐
154 DRESS":"2a03:2880:20:4f06:face:b00c:0:14", "FULLNET‐
155 WORK":"2a03:2880:0020:4f06:0000:0000:0000:0000", "NET‐
156 WORK":"2a03:2880:20:4f06::", "NETMASK":"ffff:ffff:ffff:ffff::", "PRE‐
157 FIX":"64", "REVERSEDNS":"6.0.f.4.0.2.0.0.0.8.8.2.3.0.a.2.ip6.arpa.",
158 "ADDRSPACE":"Global Unicast", "MINADDR":"2a03:2880:20:4f06::", "MAX‐
159 ADDR":"2a03:2880:20:4f06:ffff:ffff:ffff:ffff", "AD‐
160 DRESSES":"18446744073709551616", "COUNTRYCODE":"IE", "COUNTRY":"Ire‐
161 land", "COORDINATES":"53.000000,-8.000000" }
162 Lookup of a hostname
164 $ ipcalc --lookup-host localhost --no-decorate ::1
165 IPv4 lookup of a hostname
167 $ ipcalc --lookup-host localhost --no-decorate -4 127.0.0.1
168 Reverse lookup of a hostname
170 $ ipcalc -h 127.0.0.1 --no-decorate localhost
171
173 Nikos Mavrogiannopoulos <nmav@redhat.com> Erik Troan <ewt@redhat.com>
174 Preston Brown <pbrown@redhat.com> David Cantrell <dcantrell@redhat.com>
175
177 Report bugs at https://gitlab.com/ipcalc/ipcalc/issues
178
180 Copyright © 1997-2020 Red Hat, Inc. This is free software; see the
181 source for copying conditions. There is NO warranty; not even for MER‐
182 CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
183 June 2021 IPCALC(1)