Autonomous system
AS2505 HEPNET-J High Energy Accelerator Research Organization, KEK
Education APNIC
Summary
KEK (High Energy Accelerator Research Organization)
education research legacy
HEPNET-J is operated by KEK, the High Energy Accelerator Research Organization, a Japanese national research institute for particle and accelerator physics in Tsukuba.
What it's used for
- Networking for high-energy physics research (HEPNET-J, the High Energy Physics Network for Japan), connecting KEK and collaborating institutions.
Notable
- A national research-laboratory network, not a commercial ISP. The low AS number reflects an early Japanese-internet allocation tied to the physics research community.
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 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS2907 | Research Organization of Information and Systems, National Institute of Informatics | 246 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, 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 · 74.24K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 4 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS2505- Registry name
- HEPNET-J
- Registered
- 2002-04-05
- Last changed
- 2021-05-17
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 4 with no ROA
- ROAs
- 0 authorising AS2505
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 4 announcements
- Route objects
- 0 naming AS2505
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: 442 networks and 1,773 prefixes, as published 2026-10-13. 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