| Date | IP Address |
| 2015-07-25 | 54.231.225.27 (ClassC) |
| 2021-02-03 | 52.219.16.251 (ClassC) |
| 2021-03-17 | 52.219.8.155 (ClassC) |
| 2021-03-18 | 52.219.8.139 (ClassC) |
| 2021-04-05 | 52.219.17.43 (ClassC) |
| 2021-04-07 | 52.219.17.63 (ClassC) |
| 2021-04-11 | 52.219.8.143 (ClassC) |
| 2021-04-14 | 52.219.136.251 (ClassC) |
| 2021-04-22 | 52.219.136.187 (ClassC) |
| 2021-05-09 | 52.219.17.79 (ClassC) |
| 2021-05-16 | 52.219.8.135 (ClassC) |
| 2021-05-27 | 52.219.8.131 (ClassC) |
| 2023-09-16 | 52.219.150.127 (ClassC) |
| 2024-05-18 | 52.219.136.156 (ClassC) |
| 2024-08-30 | 52.219.199.87 (ClassC) |
| 2024-09-13 | 52.219.9.75 (ClassC) |
| 2024-09-18 | 52.219.151.7 (ClassC) |
| 2024-09-25 | 52.219.162.83 (ClassC) |
| 2025-01-12 | 52.219.163.71 (ClassC) |
| 2025-01-24 | 52.219.150.195 (ClassC) |
| 2025-02-14 | 3.5.154.72 (ClassC) |
| 2025-02-28 | 3.5.154.87 (ClassC) |
| 2025-04-09 | 52.219.150.179 (ClassC) |
| Date | Domain | IP |
| java.takayukikoyama.com | 2024-06-29 | 52.219.136.52 |
| android.takayukikoyama.com | 2021-07-29 | 52.219.68.30 |
| blog.takayukikoyama.com | 2024-07-03 | 52.219.1.80 |
| version-control.takayukikoyama.com | 2025-02-14 | 3.5.154.255 |
| group.takayukikoyama.com | 2024-07-10 | 52.219.199.147 |