asn.dev

Autonomous system

AS50897 AS-IMTA-BREST IMTA, Campus de Brest

Unclassified RIPE

IPv4 addresses 1.28K 4 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly FR
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Institut Mines Telecom (IMT) Atlantique - Bretagne - Pays de la Loire

France · AI-generated

education research telecom

AS-IMTA-BREST is operated by Institut Mines Telecom (IMT) Atlantique - Bretagne - Pays de la Loire.

What it's used for

  • The address space carries institutional traffic for the Brest campus, evidenced by the netname ENST-BRETAGNE and reverse DNS entries like visio-d2-209.enst-bretagne.fr.
  • The AS announces 1280 IPv4 addresses across 4 prefixes with only 2 observed neighbours, a ratio typical of a small, self-contained academic or research network rather than a transit provider.
  • Traffic consists of staff, students, and research endpoints associated with the engineering school's campus infrastructure.

Notable

  • All registrants for the announced prefixes are listed as INSTITUT MINES TELECOM; IMTA Abuse, which aligns directly with the AS holder.
  • The address inventory is small and fragmented into four distinct blocks, including a /23 and three /24s, reflecting the specific allocation history of the ENST Bretagne campus.

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 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS2200Renater299
AS44407Linkt SAS16

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 4 prefixes · 1.28K addresses IPv6 0 prefixes

CountryNamePrefixes
FRFrance4

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS50897
Registry name
AS-IMTA-BREST
Registrant
IMT-ATLANTIQUE-MNT
Abuse contact
abuse@imt-atlantique.fr
Registered
2010-04-16
Last changed
2026-04-28
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 5 valid, 0 with no ROA
ROAs
5 authorising AS50897
ASPA
no ASPA record
IRR
100% registered · 5 of 5 announcements
Route objects
6 naming AS50897

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