AS18023
Korea Maritime and Ocean University
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
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 203.230.240.0/21 | 2.0K |
0.0%
|
Korea Maritime and Ocean University | KR | Busan | Yeongdo-gu |
| 220.149.72.0/21 | 2.0K |
0.0%
|
Korea Maritime and Ocean University | KR | — | — |
| 61.82.252.0/22 | 1.0K |
0.0%
|
Korea Maritime and Ocean University | KR | — | — |
| 203.230.248.0/22 | 1.0K |
0.0%
|
Korea Maritime and Ocean University | KR | — | — |
| 203.234.92.0/22 | 1.0K |
0.0%
|
Korea Maritime and Ocean University | KR | — | — |
| 203.255.212.0/22 | 1.0K |
1.8%
|
Korea Maritime and Ocean University | KR | — | — |
| 218.154.144.0/22 | 1.0K |
0.0%
|
Korea Maritime and Ocean University | KR | — | — |
| 203.230.252.0/23 | 512 |
0.0%
|
Korea Maritime and Ocean University | KR | — | — |
| 211.197.72.0/23 | 512 |
0.0%
|
Korea Maritime and Ocean University | KR | — | — |
| 220.69.252.0/23 | 512 |
0.0%
|
Korea Maritime and Ocean University | KR | — | — |
| 121.144.249.0/24 | 256 |
0.0%
|
Korea Maritime and Ocean University | KR | — | — |
| 121.144.250.0/24 | 256 |
0.0%
|
Korea Maritime and Ocean University | KR | — | — |
| 211.220.46.0/24 | 256 |
0.0%
|
Korea Maritime and Ocean University | KR | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS18023 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 |
|---|---|---|
| 211.197.73.0/24 | 7,870 | 2026-07-23 20:44:00 |
| 211.220.46.0/24 | 7,869 | 2026-07-23 20:44:00 |
| 211.197.72.0/24 | 7,866 | 2026-07-23 20:44:00 |
| 121.144.249.0/24 | 7,788 | 2026-07-23 20:44:00 |
| 121.144.250.0/24 | 7,754 | 2026-07-23 20:44:00 |
| 61.82.252.0/23 | 6,847 | 2026-07-23 20:44:00 |
| 61.82.254.0/23 | 6,840 | 2026-07-23 20:44:00 |
| 203.230.242.0/24 | 6,732 | 2026-07-23 20:44:00 |
| 203.255.212.0/22 | 6,730 | 2026-07-23 20:44:00 |
| 203.230.243.0/24 | 6,726 | 2026-07-23 20:44:00 |
| 203.230.246.0/23 | 6,724 | 2026-07-23 20:44:00 |
| 203.234.94.0/23 | 6,721 | 2026-07-23 20:44:00 |
| 203.230.240.0/23 | 6,720 | 2026-07-23 20:44:00 |
| 203.230.253.0/24 | 6,720 | 2026-07-23 20:44:00 |
| 203.230.250.0/23 | 6,719 | 2026-07-23 20:44:00 |
| 203.230.252.0/24 | 6,719 | 2026-07-23 20:44:00 |
| 203.234.92.0/23 | 6,718 | 2026-07-23 20:44:00 |
| 203.230.244.0/23 | 6,716 | 2026-07-23 20:44:00 |
| 203.230.248.0/23 | 6,715 | 2026-07-23 20:44:00 |
| 220.149.76.0/22 | 6,713 | 2026-07-23 20:44:00 |
| 218.154.146.0/23 | 6,705 | 2026-07-23 20:44:00 |
| 218.154.144.0/23 | 6,701 | 2026-07-23 20:44:00 |
| 220.149.72.0/23 | 6,698 | 2026-07-23 20:44:00 |
| 220.69.253.0/24 | 6,697 | 2026-07-23 20:44:00 |
| 220.149.74.0/23 | 6,695 | 2026-07-23 20:44:00 |
| 220.69.252.0/24 | 6,691 | 2026-07-23 20:44:00 |
| 203.230.240.0/24 | 6,350 | 2026-07-23 20:30:43 |
| 203.230.241.0/24 | 6,346 | 2026-07-23 20:30:43 |
| 61.82.252.0/22 | 6,309 | 2026-07-23 20:30:43 |
| 203.234.92.0/22 | 6,298 | 2026-07-23 20:30:43 |
| 203.255.214.0/23 | 6,256 | 2026-07-23 20:30:43 |
| 203.230.242.0/23 | 6,238 | 2026-07-23 20:30:43 |
| 203.230.244.0/22 | 6,237 | 2026-07-23 20:30:43 |
| 218.154.144.0/22 | 6,185 | 2026-07-23 20:30:43 |
| 203.255.212.0/23 | 6,154 | 2026-07-23 20:30:43 |
| 203.230.252.0/23 | 6,115 | 2026-07-23 20:30:43 |
| 203.230.248.0/22 | 6,114 | 2026-07-23 20:30:43 |
| 220.149.76.0/23 | 6,098 | 2026-07-23 20:30:43 |
| 220.149.78.0/23 | 6,086 | 2026-07-23 20:30:43 |
| 220.149.72.0/22 | 6,062 | 2026-07-23 20:30:43 |
| 220.69.252.0/23 | 6,033 | 2026-07-23 20:30:43 |
Frequently Asked Questions
What is AS18023?
AS18023 is an Autonomous System Number assigned to Korea Maritime and Ocean 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 AS18023 announce?
AS18023 announces 11.5K IPv4 addresses distributed across 13 routed CIDR prefixes. The network is registered in South Korea.
Who operates AS18023?
AS18023 is operated by Korea Maritime and Ocean University. The organization is based in South Korea. You can view all IP ranges and related ASNs on the organization page.
What country is AS18023 registered in?
AS18023 is registered in South Korea. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
