Autonomous system
AS4729 JAEA Japan Atomic Energy Agency
Unclassified ARIN
Summary
Japan Atomic Energy Agency (JAEA)
government research legacy
JAEA is the Japan Atomic Energy Agency, Japan's national research and development institute for nuclear science and technology.
What it's used for
- Research, administrative, and site networking for JAEA's research establishments and laboratories.
Notable
- This is a government research institute's address space, not a commercial network: the addresses back scientific computing, instrumentation, and staff systems rather than customers.
- The agency holds a sizeable block (on the order of a /15's worth of IPv4) — typical of a national laboratory that was allocated space early and has held it since.
Interesting
- JAEA was formed in 2005 from the merger of the Japan Atomic Energy Research Institute (JAERI) and the Japan Nuclear Cycle Development Institute (JNC); the network predates the merged agency's name.
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 | 124 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 131K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS4729- Registry name
- JAEA
- Abuse contact
- hostmaster@nic.ad.jp
- Registered
- 1995-08-30
- Last changed
- 2025-12-19
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS4729
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 2 announcements
- Route objects
- 0 naming AS4729
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: 445 networks and 1,817 prefixes, as published 2026-10-27. 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