| IP: | 121.138.81.128 |
| Country: | |
| Region: | 11 |
| City: | Dongjak-gu |
| Latitude: | 37.4926 |
| Longitude: | 126.92 |
| Zip code: | 070 |
| Reverse DNS: | 121.138.81.128 |
| Timezone: | Asia/Seoul (2026-04-17 00:29 KST) |
| Class A: | 121 |
| Class B: | 121.138 |
| Class C: | 121.138.81 |
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