| IP: | 161.81.115.81 |
| Country: | United States (US) |
| Region: | CO |
| City: | Boulder |
| Latitude: | 40.0507 |
| Longitude: | -105.2037 |
| Zip code: | 80301 |
| Area code: | 303 |
| Reverse DNS: | 161.81.115.81.hk.chinamobile.com |
| Class A: | 161 |
| Class B: | 161.81 |
| Class C: | 161.81.115 |
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