$ query “AS63777” --type=asn → 1 result(s)
AS63777 · STARCLUSTER
National Institutes of Natural Sciences National Astronomical Observatory of JAPAN
AS63777 is operated by National Institutes of Natural Sciences National… and serves as an educational/research stub network, registered in Japan. The system announces a respectable 65 536 IPv4 addresses, including a /16. The bulk of its IP address space is in Japan. No IPv6 support — it's 2026, just saying.
Basic Information
- Country
- 🇯🇵 Japan
- Category
- Education/Research
- Network Role
- Stub Network
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Last Changed
- March 04, 2026
- Last Seen
- April 29, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 1 / 1
- IPv6 Prefixes (raw / aggregated)
- 0 / 0
- IPv4 Addresses
- 65 536
- Largest IPv4 Prefix
- /16 (65 536 addresses)
- Geolocated Countries
- 🇯🇵 Japan (65 536 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 1 upstream providing transit
- Degree
- 1 unique BGP neighbor
- Reach
- 0 networks in customer cone
Upstream Providers (1)
- AS2907 — SINET-AS
Prefix Lists
IPv4 Prefixes (1 total)
- 133.40.0.0/16 (65 536 addresses (/16 prefix))