Autonomous system
AS4729 JAEA Japan Atomic Energy Agency
Unclassified APNIC
IPv4 addresses
131K
2 prefixes
IPv6 prefixes
0
counted as prefixes, not addresses
Countries
1
mostly JP
Flagged prefixes
0
none
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.
Address space
Summary
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 2 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS4729- Registry name
- JAEA
- Abuse contact
- hostmaster@nic.ad.jp
- Last changed
- 2025-12-19
- Status
- active
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
No IC3 indicators Nothing from the FBI IC3 feed.
Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere