$ 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.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #8 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
October 21, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
605 / 465
IPv6 Prefixes (raw / aggregated)
2 / 2
IPv4 Addresses
8 820 224
Largest IPv4 Prefix
/15 (131 072 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇯🇵 Japan (8 820 224 IPs)
Prefix Changed
October 12, 2026

Reputation

Reputation
Good — 1 flagged IPs out of 8 820 224 total (0.00%)

Connectivity Summary

Upstream Providers
3 upstreams providing transit
Peers
91 networks exchanging traffic without transit
Downstream Customers
95 downstreams buying transit
Degree
189 unique BGP neighbors
Reach
105 networks in customer cone

Upstream Providers (3)

Prefix Lists

IPv4 Prefixes (605 total)

  • 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))
  • 133.34.0.0/15 (131 072 addresses (/15 prefix))
  • 133.38.0.0/15 (131 072 addresses (/15 prefix))
  • 133.44.0.0/15 (131 072 addresses (/15 prefix))
  • 133.48.0.0/15 (131 072 addresses (/15 prefix))
  • 133.62.0.0/15 (131 072 addresses (/15 prefix))
  • 133.72.0.0/15 (131 072 addresses (/15 prefix))
  • 133.82.0.0/15 (131 072 addresses (/15 prefix))
  • 133.84.0.0/15 (131 072 addresses (/15 prefix))
  • 133.94.0.0/15 (131 072 addresses (/15 prefix))
  • 133.98.0.0/15 (131 072 addresses (/15 prefix))
  • 133.102.0.0/15 (131 072 addresses (/15 prefix))
  • 150.42.0.0/15 (131 072 addresses (/15 prefix))
  • 160.28.0.0/15 (131 072 addresses (/15 prefix))
  • 163.214.0.0/15 (131 072 addresses (/15 prefix))
  • 130.34.0.0/16 (65 536 addresses (/16 prefix))
  • 130.153.0.0/16 (65 536 addresses (/16 prefix))
  • 131.206.0.0/16 (65 536 addresses (/16 prefix))
  • 133.7.0.0/16 (65 536 addresses (/16 prefix))
  • 133.8.0.0/16 (65 536 addresses (/16 prefix))
  • 133.10.0.0/16 (65 536 addresses (/16 prefix))
  • 133.12.0.0/16 (65 536 addresses (/16 prefix))
  • 133.23.0.0/16 (65 536 addresses (/16 prefix))
  • 133.29.0.0/16 (65 536 addresses (/16 prefix))
  • 133.30.0.0/16 (65 536 addresses (/16 prefix))
  • 133.37.0.0/16 (65 536 addresses (/16 prefix))
  • 133.46.0.0/16 (65 536 addresses (/16 prefix))
  • 133.52.0.0/16 (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))
  • 133.65.0.0/16 (65 536 addresses (/16 prefix))
  • 133.68.0.0/16 (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))
  • 133.86.0.0/16 (65 536 addresses (/16 prefix))
  • 133.89.0.0/16 (65 536 addresses (/16 prefix))
  • 133.96.0.0/16 (65 536 addresses (/16 prefix))
  • 133.104.0.0/16 (65 536 addresses (/16 prefix))
  • 133.187.0.0/16 (65 536 addresses (/16 prefix))
  • 133.220.0.0/16 (65 536 addresses (/16 prefix))
  • 136.187.0.0/16 (65 536 addresses (/16 prefix))
  • 144.213.0.0/16 (65 536 addresses (/16 prefix))
  • 147.157.0.0/16 (65 536 addresses (/16 prefix))
  • 150.7.0.0/16 (65 536 addresses (/16 prefix))

IPv6 Prefixes (2 total)

  • 2001:2f8::/32
  • 2405:d200::/32