| IP: | 221.133.173.21 |
| Country: | |
| Latitude: | 37.5112 |
| Longitude: | 126.9741 |
| Reverse DNS: | 221.133.173.21 |
| Timezone: | Asia/Seoul (2026-04-29 08:56 KST) |
| Class A: | 221 |
| Class B: | 221.133 |
| Class C: | 221.133.173 |
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