AS Network WHOIS Lookup

AS (autonomous systems) are individual networks that, together, make up the global Internet as we know it.

About the AS Network WHOIS Lookup tool

Network packets (traffic) are transmitted over the Internet by traversing multiple networks run by different organisations - known as Autonomous Networks. Each of these organisations is assigned a number for their network, known as an ASN (Autonomous System Number.)

Each network peers with other networks, sharing the AS numbers of the networks they peer with.

You can perform a query known as "WHOIS" to identify which organisation operates a particular AS network.

Use Cases

Use the AS Network WHOIS tool on Solid Tools for Developers to:

Identify which organisation is responsible for an ASN

Find out contacts to report abuse or technical problems with an ASN

Usage

Enter an ASN in the "AS Number" field.

Optionally select a regional WHOIS server to send your query to.

Results

The raw output from the WHOIS database will be displayed.

The following example shows a WHOIS lookup for AS15418, the AS number allocated to Fasthosts - the company and data centre that hosts the server running Solid Tools for Developers.

% This is the RIPE Database query service.
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% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to 'AS15400 - AS15474'

as-block:       AS15400 - AS15474
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2018-11-22T15:27:25Z
last-modified:  2018-11-22T15:27:25Z
source:         RIPE

% Information related to 'AS15418'

% Abuse contact for 'AS15418' is 'abuse@fasthosts.co.uk'

aut-num:        AS15418
as-name:        FASTHOSTS-INTERNET
descr:          Fasthosts Internet Ltd. Gloucester, UK.
org:            ORG-FHL1-RIPE
admin-c:        FHUK-RIPE
tech-c:         FHUK-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         AS8560-MNT
mnt-by:         AS15418-MNT
created:        2002-06-18T12:26:34Z
last-modified:  2018-05-08T12:24:45Z
source:         RIPE # Filtered

organisation:   ORG-FHL1-RIPE
org-name:       Fasthosts Internet Limited
country:        GB
org-type:       LIR
address:        Discovery House
                154 Southgate Street
address:        GL1 2EX
address:        Gloucester
address:        UNITED KINGDOM
phone:          +443330142700
fax-no:         +441452541633
mnt-ref:        AS15418-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS15418-MNT
admin-c:        FHUK-RIPE
tech-c:         FHUK-RIPE
abuse-c:        FH4126-RIPE
created:        2004-04-17T12:14:35Z
last-modified:  2023-01-09T16:11:45Z
source:         RIPE # Filtered

role:           Fasthosts Networks UK
address:        Fasthosts Internet Limited
address:        Discovery House
address:        154 Southgate Street
address:        Gloucester, GL1 2EX
phone:          +44 1452 561874
abuse-mailbox:  abuse@fasthosts.co.uk
nic-hdl:        FHUK-RIPE
remarks:        -----------------------------------------------
remarks:        Please report abuse to abuse@fasthosts.co.uk
remarks:        Abuse reports via other channels may be ignored
remarks:        -----------------------------------------------
org:            ORG-FHL1-RIPE
admin-c:        GD8691-RIPE
admin-c:        MM24449-RIPE
tech-c:         GD8691-RIPE
tech-c:         MM24449-RIPE
mnt-by:         AS15418-MNT
mnt-by:         AS8560-MNT
created:        2015-02-26T14:57:35Z
last-modified:  2019-01-28T10:09:16Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.109 (BUSA)