| Date | IP Address |
| 2022-07-12 | 18.165.83.26 (ClassC) |
| 2022-10-27 | 18.160.10.42 (ClassC) |
| 2023-08-03 | 13.35.121.29 (ClassC) |
| 2023-08-26 | 18.244.214.70 (ClassC) |
| 2023-12-04 | 172.64.144.9 (ClassC) |
| 2024-05-29 | 104.18.43.247 (ClassC) |
| 2024-08-08 | 104.18.5.18 (ClassC) |
| 2025-04-06 | 172.64.154.108 (ClassC) |
| 2025-04-19 | 104.18.33.148 (ClassC) |
| Date | Domain | IP |
| www.pfizervaccines.jp | 2024-12-06 | 104.18.33.148 |