$ query “AS24287” --type=asn → 1 result(s)
AS24287 — TEIN2-JP
National Institute of Informatics
AS24287 is an educational access provider operated by National Institute of Informatics, established in Japan. The network announces 256 IPv4 addresses. Supports IPv6.
- #9 in Japan — Top 10 by reach within country
Basic Information
- Country
- 🇯🇵 Japan
- Category
- Education/Research
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Last Changed
- March 04, 2026
- Last Seen
- March 04, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 1 / 1
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 256
- Largest IPv4 Prefix
- /24 (256 addresses)
- Largest IPv6 Prefix
- /48
- Geolocated Countries
- 🇯🇵 JP (1 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs out of 256 total (0.00%)
Connectivity Summary
- Upstream Providers
- 2 upstream autonomous systems providing transit
- Peers
- 0 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 1 downstream autonomous systems buying transit
- Degree
- 3 unique BGP neighbors (providers + customers + peers)
- Reach
- 1 716 — customer cone size measuring network influence
- Degree Rank
- #22 289
- Reach Rank
- #645
- Country Rank
- #9
Upstream Providers (2)
Prefix Lists
IPv4 Prefixes (1 total)
- 192.50.12.0/24 (256 addresses)
IPv6 Prefixes (1 total)
- 2001:df0:46::/48