asn.dev

Autonomous system

AS51588 SESAN

Unclassified RIPE

IPv4 addresses 1.02K 1 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly FR
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

SESAN

France · AI-generated

healthcare gcs france

SESAN is operated by SESAN SERVICE NUMERIQUE DE SANTE GCS.

What it's used for

  • The address space carries infrastructure for a French healthcare data exchange group, identified by the netname FR-SESAN-20180924 and registrant SESAN SERVICE NUMERIQUE DE SANTE GCS.
  • The AS announces 1024 IPv4 addresses and 1 IPv6 prefix, with only 2 observed neighbours, indicating a small, self-contained internal network rather than a transit or large-scale access provider.
  • Traffic from this AS consists of internal communications and data exchange services for the healthcare sector, supporting the group's mission of managing shared health information systems.

Notable

  • The registrant SESAN SERVICE NUMERIQUE DE SANTE GCS matches the AS holder, confirming consistent ownership of the address space.
  • The organisation was formerly known as GCS D-SISIF, a Groupement de Coopération Sanitaire established in 2008 for developing shared health information systems in Île-de-France, before being renamed to SESAN.
  • The inventory consists of a single IPv4 block, 194.56.92.0/22, and one IPv6 prefix, 2a06:3100::/29, representing a compact and focused address allocation.

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

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

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

ASNetworkPaths seen
AS8218Zayo Infrastructure France SA352
AS29075IELO-LIAZO SERVICES SAS58

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 1 prefixes · 1.02K addresses IPv6 1 prefixes

CountryNamePrefixes
FRFrance2

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS51588
Registry name
SESAN
Registrant
FR-INTERDATA-MNT
Abuse contact
samuel.gaiani-porquet@sesan.fr
Registered
2018-09-24
Last changed
2022-06-13
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
88% valid · 7 valid, 0 with no ROA 1 RPKI-invalid
ROAs
7 authorising AS51588
ASPA
no ASPA record
IRR
100% registered · 8 of 8 announcements
Route objects
2 naming AS51588

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 1,781 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