$ query “AS2907” --type=asn → 1 result(s)

AS2907 · SINET-AS

Research Organization of Information and Systems National Institute of Informatics

AS2907 is owned by Research Organization of Information and Systems National… and is a major transit provider, registered in Japan. The system announces an impressive 8.7 million IPv4 addresses, including a /15, and supports IPv6. The bulk of its IP address space is in Japan, with additional presence in Australia. This AS has recently updated its prefix announcements.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #4 in Japan — Top 10 by reach within country

Basic Information

Country
🇯🇵 Japan
Category
Education/Research
Network Role
Major Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Last Changed
March 04, 2026
Last Seen
May 15, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
604 / 463
IPv6 Prefixes (raw / aggregated)
2 / 2
IPv4 Addresses
8 688 896
Largest IPv4 Prefix
/15 (131 072 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇯🇵 Japan (9 405 440 IPs), 🇦🇺 Australia (996 608 IPs)
Prefix Changed
May 16, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
2 upstreams providing transit
Peers
93 networks exchanging traffic without transit
Downstream Customers
95 downstreams buying transit
Unclassified
2 unclassified BGP neighbors
Degree
192 unique BGP neighbors
Reach
2 734 networks in customer cone

Upstream Providers (2)

Prefix Lists

IPv4 Prefixes (604 total)

  • 133.34.0.0/15 (131 072 addresses (/15 prefix))
  • 163.214.0.0/15 (131 072 addresses (/15 prefix))
  • 160.28.0.0/15 (131 072 addresses (/15 prefix))
  • 150.42.0.0/15 (131 072 addresses (/15 prefix))
  • 133.102.0.0/15 (131 072 addresses (/15 prefix))
  • 133.98.0.0/15 (131 072 addresses (/15 prefix))
  • 133.94.0.0/15 (131 072 addresses (/15 prefix))
  • 133.84.0.0/15 (131 072 addresses (/15 prefix))
  • 133.82.0.0/15 (131 072 addresses (/15 prefix))
  • 133.72.0.0/15 (131 072 addresses (/15 prefix))
  • 133.62.0.0/15 (131 072 addresses (/15 prefix))
  • 133.16.0.0/15 (131 072 addresses (/15 prefix))
  • 133.20.0.0/15 (131 072 addresses (/15 prefix))
  • 133.48.0.0/15 (131 072 addresses (/15 prefix))
  • 133.44.0.0/15 (131 072 addresses (/15 prefix))
  • 133.38.0.0/15 (131 072 addresses (/15 prefix))
  • 160.15.0.0/16 (65 536 addresses (/16 prefix))
  • 133.58.0.0/16 (65 536 addresses (/16 prefix))
  • 133.37.0.0/16 (65 536 addresses (/16 prefix))
  • 133.30.0.0/16 (65 536 addresses (/16 prefix))
  • 133.29.0.0/16 (65 536 addresses (/16 prefix))
  • 133.46.0.0/16 (65 536 addresses (/16 prefix))
  • 133.23.0.0/16 (65 536 addresses (/16 prefix))
  • 133.52.0.0/16 (65 536 addresses (/16 prefix))
  • 202.209.0.0/16 (65 536 addresses (/16 prefix))
  • 165.93.0.0/16 (65 536 addresses (/16 prefix))
  • 164.161.0.0/16 (65 536 addresses (/16 prefix))
  • 163.226.0.0/16 (65 536 addresses (/16 prefix))
  • 163.225.0.0/16 (65 536 addresses (/16 prefix))
  • 163.212.0.0/16 (65 536 addresses (/16 prefix))
  • 133.55.0.0/16 (65 536 addresses (/16 prefix))
  • 133.57.0.0/16 (65 536 addresses (/16 prefix))
  • 160.190.0.0/16 (65 536 addresses (/16 prefix))
  • 133.60.0.0/16 (65 536 addresses (/16 prefix))
  • 133.14.0.0/16 (65 536 addresses (/16 prefix))
  • 133.65.0.0/16 (65 536 addresses (/16 prefix))
  • 133.68.0.0/16 (65 536 addresses (/16 prefix))
  • 133.12.0.0/16 (65 536 addresses (/16 prefix))
  • 133.74.0.0/16 (65 536 addresses (/16 prefix))
  • 133.77.0.0/16 (65 536 addresses (/16 prefix))
  • 133.78.0.0/16 (65 536 addresses (/16 prefix))
  • 133.81.0.0/16 (65 536 addresses (/16 prefix))
  • 133.8.0.0/16 (65 536 addresses (/16 prefix))
  • 133.7.0.0/16 (65 536 addresses (/16 prefix))
  • 133.86.0.0/16 (65 536 addresses (/16 prefix))
  • 163.209.0.0/16 (65 536 addresses (/16 prefix))
  • 163.148.0.0/16 (65 536 addresses (/16 prefix))
  • 133.89.0.0/16 (65 536 addresses (/16 prefix))
  • 131.206.0.0/16 (65 536 addresses (/16 prefix))
  • 133.96.0.0/16 (65 536 addresses (/16 prefix))

IPv6 Prefixes (2 total)

  • 2001:2f8::/32
  • 2405:d200::/32