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 v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS4665 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 |
|---|---|---|
| 1.233.238.0/24 | 48,542 | 2026-09-14 18:01:37 |
| 1.233.236.0/23 | 48,481 | 2026-09-14 18:01:37 |
| 1.233.239.0/24 | 48,469 | 2026-09-14 18:01:37 |
| 1.233.208.0/20 | 48,423 | 2026-09-14 18:01:37 |
| 1.233.240.0/24 | 48,400 | 2026-09-14 18:01:37 |
| 1.233.241.0/24 | 48,390 | 2026-09-14 18:01:37 |
| 1.233.206.0/23 | 48,333 | 2026-09-14 18:01:37 |
| 1.233.249.0/24 | 48,321 | 2026-09-14 18:01:37 |
| 1.233.228.0/22 | 48,311 | 2026-09-14 18:01:37 |
| 1.233.232.0/22 | 48,304 | 2026-09-14 18:01:37 |
| 1.233.226.0/24 | 48,297 | 2026-09-14 18:01:37 |
| 1.233.245.0/24 | 48,297 | 2026-09-14 18:01:37 |
| 1.233.246.0/24 | 48,290 | 2026-09-14 18:01:37 |
| 1.233.243.0/24 | 48,289 | 2026-09-14 18:01:37 |
| 1.233.224.0/22 | 48,288 | 2026-09-14 18:01:37 |
| 1.233.248.0/24 | 48,286 | 2026-09-14 18:01:37 |
| 1.233.252.0/24 | 48,284 | 2026-09-14 18:01:37 |
| 1.233.247.0/24 | 48,279 | 2026-09-14 18:01:37 |
| 1.233.244.0/24 | 48,277 | 2026-09-14 18:01:37 |
| 1.233.242.0/24 | 48,267 | 2026-09-14 18:01:37 |
| 1.233.255.0/24 | 48,266 | 2026-09-14 18:01:37 |
| 1.233.250.0/24 | 48,264 | 2026-09-14 18:01:37 |
| 1.233.254.0/24 | 48,255 | 2026-09-14 18:01:37 |
| 1.233.253.0/24 | 48,247 | 2026-09-14 18:01:37 |
| 1.233.251.0/24 | 48,235 | 2026-09-14 18:01:37 |
| 165.132.0.0/17 | 16,219 | 2026-09-14 18:02:15 |
| 165.132.0.0/16 | 16,207 | 2026-09-14 18:02:15 |
| 165.132.128.0/17 | 16,038 | 2026-09-14 18:02:15 |
| 165.132.32.0/21 | 16,024 | 2026-09-14 18:02:15 |
| 61.43.204.0/24 | 15,933 | 2026-09-14 18:02:08 |
| 165.132.40.0/21 | 15,761 | 2026-09-14 18:02:15 |
| 61.32.255.0/24 | 15,584 | 2026-09-14 18:01:24 |
| 115.88.77.0/24 | 15,059 | 2026-09-14 18:01:52 |
Frequently Asked Questions
What is AS4665?
AS4665 is an Autonomous System Number assigned to Yonsei 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 AS4665 announce?
AS4665 announces 65.3K IPv4 addresses distributed across 21 routed CIDR prefixes. The network is registered in South Korea.
Who operates AS4665?
AS4665 is operated by Yonsei University. The organization is based in South Korea. You can view all IP ranges and related ASNs on the organization page.
What country is AS4665 registered in?
AS4665 is registered in South Korea. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
