| Date | IP Address |
| 2015-12-10 | 54.231.65.20 (ClassC) |
| 2024-11-25 | 44.241.140.55 (ClassC) |
| 2025-02-08 | 44.224.48.249 (ClassC) |
| 2025-04-20 | 50.112.45.237 (ClassC) |
| 2025-08-03 | 52.27.127.59 (ClassC) |
| 2025-08-18 | 34.217.151.194 (ClassC) |
| 2025-09-01 | 44.238.249.83 (ClassC) |
| 2025-11-01 | 54.218.36.246 (ClassC) |
| Date | Domain | IP |
| www.spacedrepetition.com | 2024-04-23 | 54.191.19.225 |