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

AS2907 · SINET-AS

Research Organization of Information and Systems National Institute of Informatics

AS2907 belongs to Research Organization of Information and Systems National… and is a major transit provider, registered in Japan. The system announces an impressive 8.8 million IPv4 addresses, including a /15, and supports IPv6. Most of its address space is geolocated to Japan, with additional presence in Australia and Chile, and smaller footprints in 2 additional countries. Prefix announcements for this AS were recently updated.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #6 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
August 26, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
603 / 463
IPv6 Prefixes (raw / aggregated)
2 / 2
IPv4 Addresses
8 754 432
Largest IPv4 Prefix
/15 (131 072 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇯🇵 Japan (9 927 168 IPs), 🇦🇺 Australia (612 352 IPs), 🇨🇱 Chile (1 024 IPs) and 2 more
Prefix Changed
August 27, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
1 upstream providing transit
Peers
81 networks exchanging traffic without transit
Downstream Customers
95 downstreams buying transit
Degree
177 unique BGP neighbors
Reach
2 672 networks in customer cone

Upstream Providers (1)

Prefix Lists

IPv4 Prefixes (603 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))
  • 133.14.0.0/15 (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))
  • 150.59.0.0/16 (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))
  • 133.58.0.0/16 (65 536 addresses (/16 prefix))
  • 133.60.0.0/16 (65 536 addresses (/16 prefix))
  • 133.12.0.0/16 (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))
  • 133.10.0.0/16 (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))

IPv6 Prefixes (2 total)

  • 2001:2f8::/32
  • 2405:d200::/32