| IP: | 130.91.66.106 |
| Country: | United States (US) |
| Region: | PA |
| City: | Philadelphia |
| Latitude: | 39.9597 |
| Longitude: | -75.1968 |
| Zip code: | 19104 |
| Area code: | 215 |
| Reverse DNS: | subotnik-21-06.chem.upenn.edu |
| Class A: | 130 |
| Class B: | 130.91 |
| Class C: | 130.91.66 |
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