| Prefix | Company | Number of IPs |
|---|---|---|
| 134.75.0.0/16 | KISTI | 65,536 |
| 134.75.20.0/24 | KISTI | 256 |
| 134.75.52.0/23 | KISTI | 512 |
| 134.75.250.0/24 | KISTI | 256 |
| 147.47.120.0/21 | Seoul National University | 2,048 |
| 147.47.124.0/24 | Seoul National University | 256 |
| 147.47.125.0/24 | Seoul National University | 256 |
| 150.183.0.0/16 | KISTI | 65,536 |
| 150.183.11.0/24 | KISTI | 256 |
| 202.30.40.0/22 | Boramae Medical Center | 1,024 |
| 202.30.60.0/22 | KISTI | 1,024 |
| 202.31.182.0/24 | Korea Educational Development Institute | 256 |
| 203.230.2.0/24 | KISTI | 256 |
| 203.230.3.0/24 | KISTI | 256 |
| 203.230.6.0/24 | KISTI | 256 |
| 203.230.8.0/22 | Korea Water Resources Corporation | 1,024 |
| 203.230.16.0/23 | Korea Institute of Science and Technology Information | 512 |
| 203.230.22.0/23 | Incheon National University | 512 |
| 203.230.24.0/21 | Korea Institute of Science and Technology Information | 2,048 |
| 203.230.60.0/22 | KISTI | 1,024 |
| 203.230.64.0/21 | KISTI | 2,048 |
| 203.230.72.0/24 | KISTI | 256 |
| 203.230.73.0/24 | KISTI | 256 |
| 203.230.74.0/23 | Tongmyong University | 512 |
| 203.230.76.0/22 | Tongmyong University | 1,024 |
| 203.230.108.0/22 | Korean Bioinformation Center | 1,024 |
| 203.230.116.0/23 | KISTI | 512 |
| 203.230.116.0/24 | KISTI | 256 |
| 203.230.120.0/24 | KISTI | 256 |
| 203.230.126.0/24 | National Fusion Research Institute | 256 |
| 203.233.155.0/24 | KISTI | 256 |
| 203.233.156.0/24 | KISTI | 256 |
| 203.241.40.0/21 | KISTI | 2,048 |
| 203.241.116.0/23 | KISTI | 512 |
| 203.241.118.0/24 | KISTI | 256 |
| 203.241.120.0/22 | KISTI | 1,024 |
| 203.241.164.0/24 | KISTI | 256 |
| 203.241.165.0/24 | KISTI | 256 |
| 203.241.170.0/23 | KISTI | 512 |
| 203.241.172.0/23 | KISTI | 512 |
| 203.241.174.0/24 | KISTI | 256 |
| 203.247.64.0/24 | KISTI | 256 |
| 203.247.69.0/24 | KISTI | 256 |
| 203.247.73.0/24 | KISTI | 256 |
| 203.247.160.0/22 | Tongmyong University | 1,024 |
| 203.247.164.0/23 | KISTI | 512 |
| 203.247.167.0/24 | KISTI | 256 |
| 203.247.170.0/23 | Jeju Technopark | 512 |
| 203.247.172.0/22 | Korea Institute of Geoscience and Mineral Resources | 1,024 |
| 203.247.176.0/22 | Korea Institute of Geoscience and Mineral Resources | 1,024 |
| 203.247.180.0/23 | Korea Institute of Geoscience and Mineral Resources | 512 |
| 203.247.184.0/24 | Korea Electrotechnology Research Institute | 256 |
| 203.247.185.0/24 | Korea Electrotechnology Research Institute | 256 |
| 203.247.187.0/24 | Korea Electrotechnology Research Institute | 256 |
| 203.247.188.0/24 | KISTI | 256 |
| 203.247.190.0/23 | Tongmyong University | 512 |
| 203.247.192.0/20 | KISTI | 4,096 |
| 203.247.216.0/22 | KISTI | 1,024 |
| 203.250.0.0/19 | KISTI | 8,192 |
| 203.250.96.0/21 | KISTI | 2,048 |
| 203.250.112.0/21 | KISTI | 2,048 |
| 203.250.155.0/24 | Korea Astronomy and Space Science Institute | 256 |
| 203.250.156.0/22 | Korea Astronomy and Space Science Institute | 1,024 |
| 203.250.156.0/24 | Korea Astronomy and Space Science Institute | 256 |
| 203.250.160.0/21 | KISTI | 2,048 |
| 203.250.172.0/22 | KISTI | 1,024 |
| 203.250.176.0/21 | Korea Polar Research Institute | 2,048 |
| 203.250.182.0/24 | KRISO | 256 |
| 203.250.183.0/24 | KRISO | 256 |
| 203.250.192.0/18 | KISTI | 16,384 |
| 203.253.96.0/20 | KISTI | 4,096 |
| 203.253.135.0/24 | KISTI | 256 |
| 203.253.136.0/22 | KISTI | 1,024 |
| 203.253.140.0/22 | Chungnam National University | 1,024 |
| 203.253.224.0/23 | KISTI | 512 |
| 203.253.230.0/23 | KISTI | 512 |
| 203.253.234.0/23 | KISTI | 512 |
| 203.253.236.0/24 | KISTI | 256 |
| 203.253.238.0/24 | Korea Institute of Science and Technology Information | 256 |
| 203.254.40.0/24 | KISTI | 256 |
| 203.254.168.0/23 | KISTI | 512 |
| 203.254.176.0/20 | Korea Institute of Geoscience and Mineral Resources | 4,096 |
| 203.254.179.0/24 | National Research Council for | 256 |
| 203.254.180.0/24 | Science and Technology Policy Institute | 256 |
| 203.254.181.0/24 | Korea Institute for International Economic Policy | 256 |
| 203.254.185.0/24 | Korea Labor Institute | 256 |
| 203.254.186.0/24 | Korea Institute for Health and Social Affairs | 256 |
| 210.98.5.0/24 | The Korean Federation of Science and Technology Societies | 256 |
| 210.98.6.0/23 | Korea Institute of materials Science | 512 |
| 210.98.8.0/22 | Korea Institute of Geoscience and Mineral Resources | 1,024 |
| 210.98.12.0/24 | Korea Institute of Geoscience and Mineral Resources | 256 |
| 210.98.14.0/23 | Korea Institute of Geoscience and Mineral Resources | 512 |
| 210.98.24.0/23 | Korea Institute of Energy Research | 512 |
| 210.98.26.0/24 | The Korean Federation of Science and Technology Societies | 256 |
| 210.98.28.0/22 | KISTI | 1,024 |
| 210.98.44.0/24 | Korea Institute for Advanced Study | 256 |
| 210.98.47.0/24 | Korea Electrotechnology Research Institute | 256 |
| 210.98.48.0/21 | Korea Electrotechnology Research Institute | 2,048 |
| 210.98.48.0/24 | Korea Electrotechnology Research Institute | 256 |
| 210.98.52.0/24 | KOREA INSTITUTE OF OCEAN SCIENCE TECHNOLOGY | 256 |
| 2001:320::/32 | KISTI | 7.92 × 1028 |
This table only shows the first 100 of the set of IPv4 and IPv6 prefixes. All data is available via our IP data API.
IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.
AS1237 peers with these other Autonomous Systems.
Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.
AS1237 provides internet connectivity to these downstream Autonomous Systems.
A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.
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