| Date | IP Address |
| 2015-03-24 | 54.225.175.94 (ClassC) |
| 2015-03-31 | 23.21.126.203 (ClassC) |
| 2015-07-07 | 23.21.54.227 (ClassC) |
| 2015-08-25 | 54.225.135.93 (ClassC) |
| 2015-09-29 | 184.73.240.107 (ClassC) |
| 2015-10-28 | 54.243.98.31 (ClassC) |
| 2024-10-03 | 204.246.191.95 (ClassC) |
| 2024-11-01 | 3.163.158.37 (ClassC) |
| 2025-04-27 | 204.246.191.37 (ClassC) |
| 2025-06-28 | 204.246.191.111 (ClassC) |
| 2025-07-04 | 204.246.191.118 (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 |