Autonomous system
AS8643 ATHENANET Academic and Research Network in the Region
Education RIPE
Summary
ATHENAnet (National and Kapodistrian University of Athens)
education university research legacy
ATHENAnet — the campus network of the National and Kapodistrian University of Athens, Greece's oldest university (founded 1837). The RIR objects place it at Panepistimioupolis, Ilisia, the university's main Athens campus.
What it's used for
- Campus networking for students, faculty, laboratories and university services. Its two large provider-independent blocks,
195.134.64.0/18and88.197.0.0/17, are both registered asATHENA-NETdirectly to the university, and forward DNS confirms the use: university hosts such asnoc.uoa.grand departmental servers resolve into195.134.64.0/18. - The name is institutional, not commercial. "Region" in the registry description refers to the academic and research region the network serves, not a telecom footprint.
Notable
- Single-homed to AS5408, GRNET, the Greek national research and education network. Greek universities take their transit from GRNET rather than from commercial carriers, which is the standard NREN arrangement across Europe.
- Around 50,000 addresses with no reverse DNS published on the sampled space, a common posture for a campus that numbers most of its estate behind NAT and firewalls.
Interesting
- Provider-independent (PI) status on both blocks means the university owns the addresses outright rather than borrowing them from GRNET. That is what lets a campus change upstream without renumbering.
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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS5408 | National Infrastructures for Research and Technology S.A. | 282 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-24, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 51.71K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GR | Greece | 5 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS8643- Registry name
- ATHENAnet
- Registrant
- NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS
- Abuse contact
- abuse@uoa.gr
- Registered
- 1970-01-01
- Last changed
- 2018-09-04
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 5 valid, 0 with no ROA
- ROAs
- 6 authorising AS8643
- ASPA
- no ASPA record
- IRR
- 100% registered · 5 of 5 announcements
- Route objects
- 6 naming AS8643
Reputation
Classification and threat
Education University, school or national research and education network.
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: 443 networks and 1,779 prefixes, as published 2026-10-25. 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