121.78.0.0/16
87 assigned ranges in this /16.
/24 breakdown
| Block | Top country | Countries | ASNs | Ranges |
|---|---|---|---|---|
| 121.78.0.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.4.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.5.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.6.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.22.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.23.0/24 | Hong Kong (100%) | 1 | 1 | 1 |
| 121.78.24.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.27.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.28.0/24 | United States (100%) | 1 | 1 | 1 |
| 121.78.29.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.32.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.36.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.39.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.41.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.42.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.43.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.46.0/24 | Netherlands (100%) | 1 | 1 | 1 |
| 121.78.47.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.48.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.49.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.52.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.54.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.55.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.57.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.60.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.63.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.64.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.65.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.70.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.71.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.73.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.76.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.79.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.81.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.82.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.86.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.87.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.88.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.89.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.90.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.92.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.93.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.94.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.95.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.96.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.112.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.120.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.121.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.135.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.137.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.139.0/24 | Vietnam (50%) | 2 | 2 | 2 |
| 121.78.140.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.141.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.143.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.144.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.148.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.152.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.154.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.156.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.158.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.159.0/24 | United States (100%) | 1 | 1 | 1 |
| 121.78.160.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.175.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.176.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.180.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.182.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.184.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.186.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.188.0/24 | South Korea (100%) | 1 | 2 | 2 |
| 121.78.192.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.198.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.199.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.200.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.217.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.222.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.224.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.225.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.227.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.231.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.232.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.234.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.241.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.245.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.247.0/24 | South Korea (100%) | 1 | 1 | 1 |
| 121.78.253.0/24 | South Korea (100%) | 1 | 1 | 1 |
Assigned ranges
| Range | ASN | Org | Country |
|---|---|---|---|
121.78.0.0 – 121.78.3.255 | AS9957 | KINX | KR |
121.78.4.0 – 121.78.4.255 | AS9286 | KINX | KR |
121.78.5.0 – 121.78.5.255 | AS9957 | KINX | KR |
121.78.6.0 – 121.78.21.255 | AS9286 | KINX | KR |
121.78.22.0 – 121.78.22.255 | AS9286 | KINX | KR |
121.78.23.0 – 121.78.23.255 | AS17497 | liasail global hongkong limited | HK |
121.78.24.0 – 121.78.26.255 | AS9286 | KINX | KR |
121.78.27.0 – 121.78.27.255 | AS131094 | HYUNDAI MOTOR CO | KR |
121.78.28.0 – 121.78.28.255 | AS21859 | Zenlayer Inc | US |
121.78.29.0 – 121.78.31.255 | AS9286 | KINX | KR |
121.78.32.0 – 121.78.35.255 | AS9286 | KINX | KR |
121.78.36.0 – 121.78.38.255 | AS9286 | KINX | KR |
121.78.39.0 – 121.78.40.255 | AS9286 | KINX | KR |
121.78.41.0 – 121.78.41.255 | AS9286 | KINX | KR |
121.78.42.0 – 121.78.42.255 | AS9957 | KINX | KR |
72 more ranges in this block.