| Date | IP Address |
| 2015-07-01 | 96.17.10.83 (ClassC) |
| 2017-07-22 | 23.63.227.16 (ClassC) |
| 2017-08-09 | 204.93.46.89 (ClassC) |
| 2017-12-27 | 65.152.202.25 (ClassC) |
| 2018-01-15 | 216.3.51.56 (ClassC) |
| 2018-01-18 | 90.84.134.163 (ClassC) |
| 2018-03-07 | 23.215.104.152 (ClassC) |
| 2018-05-11 | 209.133.57.67 (ClassC) |
| 2022-03-31 | 172.232.13.192 (ClassC) |
| 2022-05-23 | 23.66.127.40 (ClassC) |
| 2023-04-11 | 23.213.26.81 (ClassC) |
| 2024-06-23 | 23.206.171.17 (ClassC) |
| 2024-07-17 | 23.213.175.42 (ClassC) |
| 2024-09-03 | 23.213.34.152 (ClassC) |
| 2024-10-02 | 104.96.163.82 (ClassC) |
| 2024-11-25 | 23.44.175.4 (ClassC) |
| 2024-12-01 | 23.46.228.145 (ClassC) |
| 2024-12-20 | 104.98.118.169 (ClassC) |
| 2025-01-22 | 23.213.175.200 (ClassC) |
| 2025-04-12 | 23.46.228.17 (ClassC) |
| 2025-04-16 | 23.46.228.12 (ClassC) |
| 2025-06-26 | 23.215.176.82 (ClassC) |
| 2025-07-29 | 104.96.203.16 (ClassC) |
| 2025-12-15 | 23.213.34.140 (ClassC) |
| Date | Domain | IP |
| catalyst.merck.co.jp | 2023-08-25 | 23.209.26.172 |
| www.merck.co.jp | 2015-07-01 | 96.17.10.83 |