| Date | IP Address |
| 2023-10-27 | 52.98.37.2 (ClassC) |
| 2024-05-14 | 52.98.65.18 (ClassC) |
| 2024-06-15 | 52.98.65.178 (ClassC) |
| 2024-07-03 | 52.98.33.130 (ClassC) |
| 2024-07-22 | 52.98.66.98 (ClassC) |
| 2024-08-09 | 52.98.84.114 (ClassC) |
| 2024-08-13 | 52.98.65.2 (ClassC) |
| 2024-10-03 | 52.98.90.2 (ClassC) |
| 2024-12-28 | 40.99.9.82 (ClassC) |
| Date | Domain | IP |
| mail.rikkei.com | 2024-06-16 | 52.98.50.18 |
| webmail.rikkei.com | 2023-10-27 | 52.98.37.2 |
| www.rikkei.com | 2024-10-28 | 18.138.154.173 |