Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Academic allocation +6
- Trust score 71 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 133.1.0.0/16 | 65.5K |
15.6%
|
Osaka University | JP | Osaka | Suita |
| 192.50.0.0/21 | 2.0K |
0.7%
|
Osaka University | JP | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS4730 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 133.1.0.0/16 | 3,877 | 2026-07-23 15:45:58 |
| 192.50.0.0/21 | 3,773 | 2026-07-23 15:45:12 |
Frequently Asked Questions
What is AS4730?
AS4730 is an Autonomous System Number assigned to Osaka University. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS4730 announce?
AS4730 announces 67.6K IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in Japan.
Who operates AS4730?
AS4730 is operated by Osaka University. The organization is based in Japan. You can view all IP ranges and related ASNs on the organization page.
What country is AS4730 registered in?
AS4730 is registered in Japan. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
