| IP: | 131.225.80.130 |
| Country: | |
| Region: | IL |
| City: | River Forest |
| Latitude: | 41.8936 |
| Longitude: | -87.8142 |
| Zip code: | 60305 |
| Reverse DNS: | ybk-auth-2.fnal.gov |
| Timezone: | America/Chicago (2026-03-25 06:12 CDT) |
| Class A: | 131 |
| Class B: | 131.225 |
| Class C: | 131.225.80 |
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