| Date | IP Address |
| 2020-02-04 | 13.249.79.33 (ClassC) |
| 2020-02-04 | 13.249.79.88 (ClassC) |
| 2025-04-17 | 18.161.6.56 (ClassC) |
| 2025-06-07 | 18.161.6.57 (ClassC) |
| 2025-07-04 | 18.161.6.66 (ClassC) |
| 2025-10-22 | 3.169.173.54 (ClassC) |
| Date | Domain | IP |
| blog.rubykaigi.org | 2013-06-03 | 66.6.40.49 |
| regional.rubykaigi.org | 2024-09-13 | 204.246.191.111 |
| sapporo.rubykaigi.org | 2015-03-24 | 54.225.175.94 |
| sponsorships.rubykaigi.org | 2025-04-17 | 18.161.6.56 |
| www.rubykaigi.org | 2024-11-24 | 3.163.158.8 |