WHOIS(1) Debian GNU/Linux WHOIS(1)
NAME
whois - client for the whois directory service
SYNOPSIS
whois [ { -h | --host } HOST ] [ { -p | --port } PORT ] [ -abBcdGHIK-
lLmMrRx ] [ -g SOURCE:FIRST-LAST ] [ -i ATTR[,ATTR]... ] [ -s
SOURCE[,SOURCE]... ] [ -T TYPE[,TYPE]... ] [ --verbose ] [ --no-recur-
sion ] OBJECT
whois -q KEYWORD
whois -t TYPE
whois -v TYPE
whois --help
whois --version
DESCRIPTION
whois searches for an object in a RFC 3912 database.
This version of the whois client tries to guess the right server to ask
for the specified object. If no guess can be made it will connect to
whois.networksolutions.com for NIC handles or whois.arin.net for IPv4
addresses and network names.
OPTIONS
-h HOST, --host=HOST
Connect to HOST.
-H Do not display the legal disclaimers that some registries like
to show you.
-p PORT, --port=PORT
Connect to PORT.
-I First query whois.iana.org and then follow its referral to the
whois server authoritative for that request. This works for IP
addresses, AS numbers and domains. BEWARE: this implies that
the IANA server will receive your complete query.
--no-recursion
Disable recursion from registry to registrar servers.
--verbose
Be verbose.
--help Display online help.
--version
Display the program version.
Other options are flags understood by whois.ripe.net and some other
RIPE-like servers:
-a Also search all the mirrored databases.
-b Return brief IP address ranges with abuse contact.
-B Disable objects filtering. (Show the e-mail addresses.)
-c Return the smallest IP address range with a reference to an irt
object.
-d Return the reverse DNS delegation object too.
-g SOURCE:FIRST-LAST
Search updates from SOURCE database between FIRST and LAST up-
date serial number. It is useful to obtain Near Real Time Mir-
roring stream.
-G Disable grouping of associated objects.
-i ATTR[,ATTR]...
Inverse-search objects having associated attributes. ATTR is
the attribute name, while the positional OBJECT argument is the
attribute value.
-K Return primary key attributes only. An exception is the members
attribute of set objects, which is always returned. Another ex-
ception are all attributes of the objects organisation, person
and role, that are never returned.
-l Return the one level less specific object.
-L Return all levels of less specific objects.
-m Return all one level more specific objects.
-M Return all levels of more specific objects.
-q KEYWORD
Return information about the server. KEYWORD can be version
for the server version, sources for the list of database
sources or types for the list of supported object types.
-r Disable recursive lookups for contact information.
-R Disable following referrals and force showing the object from
the local copy in the server.
-s SOURCE[,SOURCE]...
Request the server to search for objects mirrored from SOURCE.
Sources are delimited by comma, and the order is significant.
Use the -q sources parameter to obtain a list of valid sources.
-t TYPE Return the template for a object of TYPE.
-T TYPE[,TYPE]...
Restrict the search to objects of TYPE. Multiple types are
separated by a comma.
-v TYPE Return the verbose template for a object of TYPE.
-x Search for only exact match on network address prefix.
NOTES
When querying the Verisign gTLDs (e.g. .com, .net...) thin registry
servers for a domain, the program will automatically prepend the domain
keyword to only show domain records. The nameserver or registrar key-
words must be used to show other kinds of records.
When querying whois.arin.net for IPv4 or IPv6 networks, the CIDR net-
mask length will be automatically removed from the query string.
When querying whois.nic.ad.jp for AS numbers, the program will automat-
ically convert the request in the appropriate format, inserting a space
after the string AS.
When querying whois.denic.de for domain names and no other flags have
been specified, the program will automatically add the flag -T dn.
When querying whois.dk-hostmaster.dk for domain names and no other
flags have been specified, the program will automatically add the flag
--show-handles.
RIPE-specific command line options are ignored when querying non-RIPE
servers. This may or may not be the behaviour intended by the user.
When using non-standard query parameters then the command line options
which are not to be interpreted by the client must follow the -- sepa-
rator (which marks the beginning of the query string).
If the /etc/whois.conf configuration file exists, it will be consulted
to find a server before applying the normal rules. Each line of the
file should contain a regular expression to be matched against the
query text and the whois server to use, separated by white space. IDN
domains must use the ACE format.
The whois protocol does not specify an encoding for characters which
cannot be represented by ASCII and implementations vary wildly. If the
program knows that a specific server uses a certain encoding, if needed
it will transcode the server output to the encoding specified by the
current system locale.
Command line arguments will always be interpreted accordingly to the
current system locale and converted to the IDN ASCII Compatible Encod-
ing.
FILES
/etc/whois.conf
ENVIRONMENT
LANG When querying whois.nic.ad.jp and whois.jprs.jp English text is
requested unless the LANG or LC_MESSAGES environment variables
specify a Japanese locale.
WHOIS_OPTIONS
A list of options which will be evaluated before the ones speci-
fied on the command line.
WHOIS_SERVER
This server will be queried if the program cannot guess where
some kind of objects are located. If the variable does not exist
then whois.arin.net will be queried.
SEE ALSO
whois.conf(5).
RFC 3912: WHOIS Protocol Specification.
RIPE Database Query Reference Manual:
<http://www.ripe.net/data-tools/support/documentation/ripe-data-
base-query-reference-manual>
BUGS
The program may have buffer overflows in the command line parser: be
sure to not pass untrusted data to it. It should be rewritten to use a
dynamic strings library.
HISTORY
This program closely tracks the user interface of the whois client de-
veloped at RIPE by Ambrose Magee and others on the base of the original
BSD client.
AUTHOR
Whois and this man page were written by Marco d'Itri <md@linux.it> and
are licensed under the terms of the GNU General Public License, version
2 or higher.
Marco d'Itri 2019-12-30 WHOIS(1)
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