asn.dev

Autonomous system

AS21000 ATOS-AS

Unclassified RIPE

IPv4 addresses 9.22K 10 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly FR
Exchanges 1 recorded by PCH
Upstreams 4 0 downstream
Flagged prefixes 0 none

Summary

Atos France

France · AI-generated

business corporate france infrastructure

The AS handle ATOS-AS is held by Atos France SAS.

What it's used for

  • The address space carries corporate infrastructure, evidenced by netnames such as FR-ATOSNET, FR-ATOSNET-INFRA-114, and FR-ATOSNET-INFRA-241.
  • The AS announces 9,216 IPv4 addresses across 10 prefixes with only 4 observed neighbours, indicating a small internal corporate estate rather than a transit or access network.

Notable

  • Registrants are consistent with the announcer, primarily listing Atos France SAS and ATOS-INFOGERANCE-SVA, with some prefixes registered to W-HA SA.
  • The address inventory is finely subdivided into multiple /24 and /23 blocks, reflecting site-by-site segmentation typical of a large enterprise.
  • No IPv6 prefixes are announced in the inventory.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
France-IX ParisParis, France37.49.236.137

Transit providers

4 upstream, 0 downstream and 4 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS6461Zayo Bandwidth885
AS5400British Telecommunications Limited304
AS198949Radware Ltd104
AS13335Cloudflare, Inc.65

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 10 prefixes · 9.22K addresses IPv6 0 prefixes

CountryNamePrefixes
FRFrance10

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS21000
Registry name
ATOS-AS
Registrant
MNT-AOI-NSS
Abuse contact
noc-fr-nwc@atos.net
Registered
2002-07-04
Last changed
2024-04-08
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
17% valid · 4 valid, 19 with no ROA
ROAs
4 authorising AS21000
ASPA
no ASPA record
IRR
100% registered · 23 of 23 announcements
Route objects
23 naming AS21000

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,782 prefixes, as published 2026-10-16. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check