AS4729 — JAEA Japan Atomic Energy Agency

AS4729 announces 2 IPv4 prefixes covering 131,072 addresses and 0 IPv6 prefixes.

About this network

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.

Announced prefixes

• 133.53.0.0/16
• 133.188.0.0/16

Upstream networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics

Adjacent networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics

Routing security

• RPKI: 0 valid, 0 invalid and 2 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 0% of announcements registered; 0 route objects.
• Listed in as-sets: AS-IIJ, AS-IIJ6, AS-WIDE, AS20965:AS-FROM-TEIN-TO-GEANT, AS2497:AS-IIJ, AS2497:AS-IIJ6.