What is the Whois and how to query it?

Map Of Internet 1973

What is the Whois and how to query it?

About

whois literally who is is an Internet database that identifies who owns:

and how to get in contact with them.

Query

Command line

It can be queried with the whois protocol.

You can get information via the whois client 1)

Example:

  • Installation on Linux Debian based (Ubuntu, …)
sudo apt-get whois
  • Installation on Linux Fedora based (Centos, Redhat, …)
# yum install whois

whois 172.67.150.50

whois domain.extension

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2022, American Registry for Internet Numbers, Ltd.
#


NetRange:       172.64.0.0 - 172.71.255.255
CIDR:           172.64.0.0/13
NetName:        CLOUDFLARENET
NetHandle:      NET-172-64-0-0-1
Parent:         NET172 (NET-172-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       AS13335
Organization:   Cloudflare, Inc. (CLOUD14)
RegDate:        2015-02-25
Updated:        2021-05-26
Comment:        All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse
Ref:            https://rdap.arin.net/registry/ip/172.64.0.0


OrgName:        Cloudflare, Inc.
OrgId:          CLOUD14
Address:        101 Townsend Street
City:           San Francisco
StateProv:      CA
PostalCode:     94107
Country:        US
RegDate:        2010-07-09
Updated:        2021-07-01
Ref:            https://rdap.arin.net/registry/entity/CLOUD14


OrgAbuseHandle: ABUSE2916-ARIN
OrgAbuseName:   Abuse
OrgAbusePhone:  +1-650-319-8930
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE2916-ARIN

OrgRoutingHandle: CLOUD146-ARIN
OrgRoutingName:   Cloudflare-NOC
OrgRoutingPhone:  +1-650-319-8930
OrgRoutingEmail:  [email protected]
OrgRoutingRef:    https://rdap.arin.net/registry/entity/CLOUD146-ARIN

OrgTechHandle: ADMIN2521-ARIN
OrgTechName:   Admin
OrgTechPhone:  +1-650-319-8930
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/ADMIN2521-ARIN

OrgNOCHandle: CLOUD146-ARIN
OrgNOCName:   Cloudflare-NOC
OrgNOCPhone:  +1-650-319-8930
OrgNOCEmail:  [email protected]
OrgNOCRef:    https://rdap.arin.net/registry/entity/CLOUD146-ARIN

RAbuseHandle: ABUSE2916-ARIN
RAbuseName:   Abuse
RAbusePhone:  +1-650-319-8930
RAbuseEmail:  [email protected]
RAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE2916-ARIN

RNOCHandle: NOC11962-ARIN
RNOCName:   NOC
RNOCPhone:  +1-650-319-8930
RNOCEmail:  [email protected]
RNOCRef:    https://rdap.arin.net/registry/entity/NOC11962-ARIN

RTechHandle: ADMIN2521-ARIN
RTechName:   Admin
RTechPhone:  +1-650-319-8930
RTechEmail:  [email protected]
RTechRef:    https://rdap.arin.net/registry/entity/ADMIN2521-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2022, American Registry for Internet Numbers, Ltd.
#

Online

Database

The global coordination of the DNS Root, IP addressing, and other Internet protocol resources is performed as the Internet Assigned Numbers Authority (IANA) functions

The IANA WHOIS Service is provided using the WHOIS protocol on port 43.

Whois service of IANA are checked every month to get Root Whois Servers List. See Root whois watcher

For instance:

  • You search first at IANA
https://www.iana.org/whois?q=172.67.150.50

% IANA WHOIS server
% for more information on IANA, visit http://www.iana.org
% This query returned 1 object

refer:        whois.arin.net

inetnum:      172.0.0.0 - 172.255.255.255
organisation: Administered by ARIN
status:       LEGACY

remarks:      172.16.0.0/12 reserved for Private-Use Networks
remarks:      [RFC1918]. Complete registration details are found
remarks:      iniana-ipv4-special-registry.

whois:        whois.arin.net

changed:      1993-05
source:       IANA
  • The refer whois is whois.arin.net, you:
    • go to https://whois.arin.net and search the owner of the IP via the search box
    • see that the IP is managed by the RIPE Network Coordination Centre (RIPE, Amsterdam)

The RIPE NCC 2) consists of over 20,000 organisations that act as Local Internet Registries (LIRs) to provide Internet services in their own countries.

Service Region

The whois database are managed by the accreditation organisms (known as rirs ) that manages a region.

1)
https://github.com/rfc1036/whois
2)
https://www.ripe.net/about-us/what-we-do/ripe-ncc-service-region




Discover More
Arin
ARIN

is a Regional Internet Registry. They oversee the allocation and registration of Internet number resources in their region (America). offers a “web-based” interface to Whois data at ...
Map Of Internet 1973
Classless Inter-Domain Routing (CIDR)

is a notation that defines a subnet (ip net range) CIDR notation: where: IP Address is a prefix is the subnet mask prefix length. where: 0.0.0.0 is the wildcard IP address that match...
Map Of Internet 1973
Domain Registration and Ownership

On this page, we talk the registration of a domain as a unit of ownership and registration which is called for a user or normal organization, an apex domain. The status of a domain name registration...
Map Of Internet 1973
Network - Resource Management

This page is resource in network. On the Internet, the principal resource are Networks (ie list of IP). To own an network of IP on the internet, you need to obtain a ASNs via an accreditation organism....
Map Of Internet 1973
Network - Subnet (Address Range)

A subnet is technically a division of an network by range of ip address A subnet is also known as: a net range (ie 172.64.0.0 - 172.71.255.255) or a CIDR (different notation - ie 172.64.0.0/13) ...
Ripe Ncc
RIPE

is a Regional Internet Registry. They oversee the allocation and registration of Internet number resources in their region (Europe) The Database contains whois registration details of: IP addresses...
Regional Internet Registries Map
Regional Internet Registries (RIRs)

The Regional Internet Registries (RIR) are regional organisation that manages the internet in cooperation with IANA. They have the authority within their regions: to administer and register the following...
Public Vs Private Ip Address
What is a IP Address? A Unique network IDentifier

An IP address is: the address of the Internet protocol (IP) that identifies: a single interface with a unicast address or set of interfaces with a multicast address With Ipv4: where:...



Share this page:
Follow us:
Task Runner