AS24287 — TEIN2-JP - National Institute of Informatics

AS24287 announces 1 IPv4 prefixes covering 256 addresses and 1 IPv6 prefixes.

About this network

TEIN2-JP is the autonomous system for the National Institute of Informatics.

What it's used for

• The space carries research and academic traffic, evidenced by the netname SINET-PI-CIDR-BLK-JP and the holder's identity as a Japanese national research institute.
• The AS announces 256 IPv4 addresses and 1 IPv6 prefix, with 4 observed neighbours; this small inventory against a low neighbour count indicates an internal research network rather than a transit or access provider.

Notable

• The registrant for the announced prefix is the Japan Network Information Center (JPNIC), which is consistent with the announcer as JPNIC is the registry for Japanese address space.
• The address inventory consists of a single /24 block and one /48 IPv6 prefix, representing a compact estate typical of a specific institutional site.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 192.50.12.0/24
• 2001:df0:46::/48

Upstream networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS7660 Asia Pacific Advanced Network - Japan
• AS24490 Trans-Eurasia Information Network (TEIN2) - SG

Downstream networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS24489 Trans-Eurasia Information Network (TEIN2) - North
• AS7660 Asia Pacific Advanced Network - Japan

Adjacent networks

• AS24490 Trans-Eurasia Information Network (TEIN2) - SG
• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS7660 Asia Pacific Advanced Network - Japan
• AS24489 Trans-Eurasia Information Network (TEIN2) - North

Routing security

• RPKI: 1 valid, 0 invalid and 1 not-found announcements; 1 ROAs.
• ASPA: none published.
• IRR: 0% of announcements registered; 0 route objects.
• Listed in as-sets: AS-IIJ, AS-IIJ6, AS20965:AS-FROM-TEIN-TO-GEANT, AS2497:AS-IIJ, AS2497:AS-IIJ6, AS293:AS-FROM-SINGAREN-TO-ESNET, AS293:AS-FROM-TRANSPAC-TO-ESNET.