asn.dev

Autonomous system

AS8991 HCMR-NET

Unclassified RIPE

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

Summary

Hellenic Centre for Marine Research (HCMR)

Greece · AI-generated

government research legacy

HCMR-NET is the network of the Hellenic Centre for Marine Research, Greece's national research organisation for oceanography and marine science, headquartered at Anavyssos in Attica.

What it's used for

  • Networking for HCMR's research institutes and campuses. Reverse DNS on the announced prefixes resolves entirely into hcmr.gr, with site labels marking the main locations: .her.hcmr.gr for Heraklion, Crete and .ath.hcmr.gr for Athens.
  • The named hosts are institutional infrastructure (nameservers, mail relays, LDAP, RADIUS, compute nodes and site routers), not customer or subscriber space.

Notable

  • A state research organisation, so this is government/academic address space rather than commercial. It should not be geolocated as consumer or hosting space.
  • Small and self-contained: roughly 1,300 IPv4 addresses across four prefixes, with a couple of upstreams and no downstream customers.
  • Part of the space is drawn from Greek academic-network blocks (83.212.x and 195.251.x), which is where most Greek research institutions are numbered.

Interesting

  • HCMR runs research vessels, a crewed submersible and ROVs; some of the hosts on this network front oceanographic data services, including national ocean-data holdings.

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
AS5408National Infrastructures for Research and Technology S.A.246
AS3329Vodafone-panafon Hellenic Telecommunications Company SA2

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-23, 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
GRGreece4

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS8991
Registry name
HCMR-NET
Registrant
AS8991-MNT
Abuse contact
noc@her.hcmr.gr
Registered
1970-01-01
Last changed
2016-04-14
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 4 valid, 0 with no ROA
ROAs
4 authorising AS8991
ASPA
no ASPA record
IRR
100% registered · 4 of 4 announcements
Route objects
6 naming AS8991

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 1,779 prefixes, as published 2026-10-24. 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