| Date | IP Address |
| 2019-09-04 | 23.201.77.16 (ClassC) |
| 2024-09-13 | 23.222.147.172 (ClassC) |
| 2024-12-27 | 23.44.254.179 (ClassC) |
| 2025-01-15 | 23.6.110.165 (ClassC) |
| Date | Domain | IP |
| www1.mastercard.co.jp | 2023-08-25 | 23.196.194.63 |
| stage.mastercard.co.jp | 2023-08-25 | 23.196.114.77 |
| mtf.mastercard.co.jp | 2024-04-19 | 23.202.207.93 |
| www.mastercard.co.jp | 2024-09-13 | 23.222.147.172 |