| Date | IP Address |
| 2015-12-01 | 54.65.22.45 (ClassC) |
| 2016-05-27 | 52.193.19.132 (ClassC) |
| 2017-04-18 | 52.69.9.87 (ClassC) |
| 2018-09-08 | 54.65.23.182 (ClassC) |
| 2018-11-21 | 13.113.5.56 (ClassC) |
| 2019-12-13 | 52.68.58.220 (ClassC) |
| 2020-01-26 | 13.112.93.52 (ClassC) |
| 2020-06-06 | 52.192.206.17 (ClassC) |
| 2021-10-09 | 52.69.22.95 (ClassC) |
| 2021-10-25 | 54.92.15.132 (ClassC) |
| 2024-12-23 | 54.168.45.8 (ClassC) |
| 2025-01-21 | 18.179.147.253 (ClassC) |
| 2025-02-10 | 3.114.244.160 (ClassC) |
| 2025-02-27 | 57.182.81.71 (ClassC) |
| 2025-05-07 | 57.180.82.68 (ClassC) |
| 2025-06-26 | 35.74.41.166 (ClassC) |
| 2025-08-18 | 35.78.152.116 (ClassC) |
| 2025-09-08 | 52.194.5.116 (ClassC) |
| 2025-11-21 | 35.77.137.154 (ClassC) |
| Date | Domain | IP |
| job.atmarkit.co.jp | 2023-08-25 | 54.238.85.132 |
| core.atmarkit.co.jp | 2024-12-16 | 54.150.32.4 |
| tech.atmarkit.co.jp | 2024-12-16 | 54.168.45.8 |
| jibun.atmarkit.co.jp | 2023-08-25 | 54.238.85.132 |
| el.jibun.atmarkit.co.jp | 2023-08-25 | 18.178.244.202 |
| members.atmarkit.co.jp | 2025-09-15 | 54.150.112.210 |
| status.atmarkit.co.jp | 2025-09-19 | 52.69.221.68 |
| monoist.atmarkit.co.jp | 2024-12-23 | 54.168.45.8 |
| www.atmarkit.co.jp | 2023-11-01 | 176.34.25.82 |