| Date | IP Address |
| 2013-12-10 | 202.32.173.84 (ClassC) |
| 2015-03-30 | 54.64.203.210 (ClassC) |
| 2016-09-01 | 52.69.149.67 (ClassC) |
| 2019-02-12 | 18.179.214.225 (ClassC) |
| 2021-10-13 | 18.180.209.225 (ClassC) |
| 2022-02-13 | 13.230.13.27 (ClassC) |
| 2024-04-23 | 172.64.154.242 (ClassC) |
| 2025-01-04 | 172.64.144.15 (ClassC) |
| 2026-02-15 | 104.18.43.241 (ClassC) |
| Date | Domain | IP |
| www.animalhealth.pfizer.co.jp | 2015-06-19 | 54.230.101.114 |
| ghw.pfizer.co.jp | 2024-06-30 | 104.18.33.14 |
| www.pfizer.co.jp | 2024-04-23 | 172.64.154.242 |