ASN AS21000 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21000?

AS21000 is listed under Atos France SAS.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS21000 Atos France SAS | IPGeolocation.io

ASN Lookup Tool

Atos France SAS atos.net

FR 23 Routes

AS Data

AS21000

AS21000 – Atos France SAS

AS Number	21000
AS Name	ATOS-AS
Organization	Atos France SAS (org-ap1-ripe)
Country	FR
Website	atos.net
Number of IPv4 Routes	23
Number of IPv6 Routes	0
ASN type	BUSINESS
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2002-07-04

ASN Intelligence API for production workflows

Use ASN data for AS21000 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
193.28.205.0/24	AS21000	Atos France SAS	W HA SA	256
80.78.0.0/24	AS21000	Atos France SAS	ATOS Infogerance	256
80.78.1.0/24	AS21000	Atos France SAS	ATOS Origin Infogerance	256
80.78.8.0/24	AS21000	Atos France SAS	Atos Client Hosting	256
80.78.4.0/24	AS21000	Atos France SAS	FR ATOS DISP	256
80.78.6.0/24	AS21000	Atos France SAS	Atos Origin Integration France	256
193.164.148.0/24	AS21000	Atos France SAS	W HA SA	256
80.78.5.0/24	AS21000	Atos France SAS	AO Extranet Corporate Services	256
80.78.12.0/24	AS21000	Atos France SAS	Atos France NWC	256
129.185.224.0/20	AS21000	Atos France SAS	ATOS Infogerance	4096

Raw Whois Response

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to 'AS20929 - AS21002'

as-block:       AS20929 - AS21002
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:        2018-11-22T15:27:27Z
last-modified:  2018-11-22T15:27:27Z
source:         RIPE

% Information related to 'AS21000'

% Abuse contact for 'AS21000' is 'noc-fr-nwc@atos.net'

aut-num:        AS21000
as-name:        ATOS-AS
org:            ORG-AP1-RIPE
import:         from AS6461 accept ANY
import:         from AS5400 accept ANY
export:         to AS6461 announce AS21000
export:         to AS5400 announce AS21000
admin-c:        AAR69-RIPE
tech-c:         AAR69-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         SVA-INFOGERANCE
mnt-by:         MNT-AOI-NSS
created:        2002-07-04T12:00:13Z
last-modified:  2024-04-08T12:45:13Z
source:         RIPE # Filtered

organisation:   ORG-AP1-RIPE
org-name:       Atos France SAS
country:        FR
org-type:       LIR
address:        80 Quai Voltaire
address:        95877
address:        BEZONS
address:        FRANCE
phone:          +33146255000
fax-no:         +33142042029
abuse-c:        AR15192-RIPE
mnt-ref:        SVA-INFOGERANCE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        MNT-AOI-NSS
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         SVA-INFOGERANCE
admin-c:        PB16993-RIPE
admin-c:        JN4683-RIPE
admin-c:        RC21028-RIPE
created:        2004-04-17T11:21:07Z
last-modified:  2026-03-20T15:53:08Z
source:         RIPE # Filtered

role:           ATOS-INFOGERANCE-SVA Admin Role
address:        Atos France SAS 80 Quai Voltaire 95877 BEZONS
admin-c:        RC21028-RIPE
tech-c:         MF2396-RIPE
tech-c:         RC21028-RIPE
tech-c:         ST6191-RIPE
mnt-by:         SVA-INFOGERANCE
mnt-by:         MNT-AOI-NSS
nic-hdl:        AAR69-RIPE
created:        2007-11-27T17:46:40Z
last-modified:  2024-04-22T08:38:35Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.121.2 (BUSA)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.ripe.net",
  "as_blocks" : [ {
    "as_block" : "AS20929 - AS21002",
    "description" : [ "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" ],
    "date_created" : "2018-11-22",
    "date_updated" : "2018-11-22",
    "source" : "RIPE"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS21000",
    "as_name" : "ATOS-AS",
    "status" : "ASSIGNED",
    "import" : [ "from AS6461 accept ANY", "from AS5400 accept ANY" ],
    "export" : [ "to AS6461 announce AS21000", "to AS5400 announce AS21000" ],
    "organization" : "ORG-AP1-RIPE",
    "admin_contacts" : [ "AAR69-RIPE" ],
    "tech_contacts" : [ "AAR69-RIPE" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "SVA-INFOGERANCE", "MNT-AOI-NSS" ],
    "date_created" : "2002-07-04",
    "date_updated" : "2024-04-08",
    "source" : "RIPE"
  } ],
  "organization" : {
    "handle" : "ORG-AP1-RIPE",
    "name" : "Atos France SAS",
    "type" : "LIR",
    "address" : [ "80 Quai Voltaire", "95877", "BEZONS", "FRANCE" ],
    "street" : "Quai Voltaire",
    "city" : "Bezons",
    "zip_code" : "95877",
    "country" : [ "FR" ],
    "phone" : [ "+33146255000" ],
    "fax_no" : [ "+33142042029" ],
    "admin_contacts" : [ "PB16993-RIPE", "JN4683-RIPE", "RC21028-RIPE" ],
    "abuse_contacts" : [ "AR15192-RIPE" ],
    "mnt_ref" : [ "SVA-INFOGERANCE", "RIPE-NCC-HM-MNT", "MNT-AOI-NSS" ],
    "mnt_by" : [ "RIPE-NCC-HM-MNT", "SVA-INFOGERANCE" ],
    "date_created" : "2004-04-17",
    "date_updated" : "2026-03-20",
    "source" : "RIPE",
    "addressCountry" : "FRANCE"
  },
  "administrative_contacts" : [ {
    "handle" : "AAR69-RIPE",
    "name" : "ATOS-INFOGERANCE-SVA Admin Role",
    "address" : [ "Atos France SAS 80 Quai Voltaire 95877 BEZONS" ],
    "street" : "Quai Voltaire",
    "city" : "Bezons",
    "zip_code" : "95877",
    "admin_contacts" : [ "RC21028-RIPE" ],
    "tech_contacts" : [ "MF2396-RIPE", "RC21028-RIPE", "ST6191-RIPE" ],
    "mnt_by" : [ "SVA-INFOGERANCE", "MNT-AOI-NSS" ],
    "date_created" : "2007-11-27",
    "date_updated" : "2024-04-22",
    "source" : "RIPE"
  } ],
  "technical_contacts" : [ {
    "handle" : "AAR69-RIPE",
    "name" : "ATOS-INFOGERANCE-SVA Admin Role",
    "address" : [ "Atos France SAS 80 Quai Voltaire 95877 BEZONS" ],
    "street" : "Quai Voltaire",
    "city" : "Bezons",
    "zip_code" : "95877",
    "admin_contacts" : [ "RC21028-RIPE" ],
    "tech_contacts" : [ "MF2396-RIPE", "RC21028-RIPE", "ST6191-RIPE" ],
    "mnt_by" : [ "SVA-INFOGERANCE", "MNT-AOI-NSS" ],
    "date_created" : "2007-11-27",
    "date_updated" : "2024-04-22",
    "source" : "RIPE"
  } ]
}

Peers

AS Number	Description	Country
AS13335	Cloudflare, Inc.	US
AS198949	Radware Ltd	IL
AS6461	Zayo Bandwidth	US
AS5400	British Telecommunications PLC	GB

Upstreams

AS Number	Description	Country
AS13335	Cloudflare, Inc.	US
AS198949	Radware Ltd	IL
AS6461	Zayo Bandwidth	US
AS5400	British Telecommunications PLC	GB