| Date | IP Address |
| 2021-11-05 | 13.35.125.48 (ClassC) |
| 2024-12-19 | 3.165.160.95 (ClassC) |
| 2025-11-26 | 3.163.24.92 (ClassC) |
| Date | Domain | IP |
| static.runsignup.com | 2024-12-24 | 3.163.189.59 |
| signupapp.runsignup.com | 2024-03-20 | 18.161.6.125 |
| analytics.runsignup.com | 2024-02-12 | 65.8.161.3 |
| cdnjs.runsignup.com | 2024-07-13 | 204.246.191.36 |
| iad-dynamic-assets.runsignup.com | 2025-03-08 | 18.238.238.66 |
| test-iad-dynamic-assets.runsignup.com | 2024-12-19 | 3.165.160.95 |
| cmh-dynamic-assets.runsignup.com | 2024-11-21 | 18.161.6.53 |
| results.runsignup.com | 2024-07-19 | 3.163.24.108 |
| www.runsignup.com | 2025-07-10 | 54.165.155.11 |