$ 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 8.8 million IPv4 addresses, including a /15, and supports IPv6. Its primary geographic footprint is in Japan, with additional presence in Australia.
- 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
- April 28, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 606 / 464
- IPv6 Prefixes (raw / aggregated)
- 2 / 2
- IPv4 Addresses
- 8 819 968
- Largest IPv4 Prefix
- /15 (131 072 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇯🇵 Japan (9 536 512 IPs), 🇦🇺 Australia (996 608 IPs)
- Prefix Changed
- April 20, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 2 upstreams providing transit
- Peers
- 94 networks exchanging traffic without transit
- Downstream Customers
- 95 downstreams buying transit
- Unclassified
- 2 unclassified BGP neighbors
- Degree
- 193 unique BGP neighbors
- Reach
- 2 944 networks in customer cone
Upstream Providers (2)
Prefix Lists
IPv4 Prefixes (606 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))
- 163.226.0.0/16 (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))
- 163.225.0.0/16 (65 536 addresses (/16 prefix))
- 163.212.0.0/16 (65 536 addresses (/16 prefix))
- 163.209.0.0/16 (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))
- 133.12.0.0/16 (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))
- 163.148.0.0/16 (65 536 addresses (/16 prefix))
- 163.145.0.0/16 (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))
- and 414 more
IPv6 Prefixes (2 total)
- 2001:2f8::/32
- 2405:d200::/32