| Date | IP Address |
| 2019-12-09 | 13.226.139.27 (ClassC) |
| 2019-12-09 | 13.226.139.89 (ClassC) |
| 2019-12-09 | 13.226.139.121 (ClassC) |
| 2019-12-09 | 13.226.139.128 (ClassC) |
| 2020-02-14 | 13.249.89.79 (ClassC) |
| 2020-02-14 | 13.249.89.13 (ClassC) |
| 2020-05-06 | 99.84.166.7 (ClassC) |
| 2020-05-21 | 99.84.245.101 (ClassC) |
| 2020-05-21 | 99.84.245.117 (ClassC) |
| 2020-05-21 | 99.84.245.21 (ClassC) |
| 2020-05-21 | 99.84.245.50 (ClassC) |
| 2020-06-05 | 52.84.23.39 (ClassC) |
| 2020-06-05 | 52.84.23.75 (ClassC) |
| 2020-08-17 | 143.204.0.95 (ClassC) |
| 2020-09-21 | 13.249.95.52 (ClassC) |
| 2020-09-21 | 13.249.95.88 (ClassC) |
| 2021-02-17 | 13.226.14.40 (ClassC) |
| 2021-03-14 | 13.226.10.126 (ClassC) |
| 2021-03-14 | 13.226.10.20 (ClassC) |
| 2022-01-28 | 13.226.9.37 (ClassC) |
| 2024-11-21 | 18.161.6.53 (ClassC) |
| 2024-12-09 | 204.246.191.37 (ClassC) |
| 2025-02-26 | 3.163.158.87 (ClassC) |
| 2025-03-03 | 204.246.191.14 (ClassC) |
| 2025-03-16 | 18.161.6.116 (ClassC) |
| 2025-06-05 | 204.246.191.111 (ClassC) |
| 2025-08-04 | 204.246.191.35 (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 | 2024-08-05 | 18.161.6.87 |
| 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 | 2024-11-12 | 34.194.61.140 |