| Date | IP Address |
| 2019-11-20 | 52.69.5.21 (ClassC) |
| 2023-11-01 | 54.178.166.95 (ClassC) |
| 2024-02-26 | 176.32.71.129 (ClassC) |
| 2024-05-02 | 13.112.194.46 (ClassC) |
| 2024-09-11 | 13.115.244.106 (ClassC) |
| 2024-11-25 | 52.192.255.203 (ClassC) |
| 2025-01-29 | 18.177.239.7 (ClassC) |
| 2025-04-27 | 18.180.185.11 (ClassC) |
| 2025-06-07 | 54.64.23.235 (ClassC) |
| 2025-08-10 | 35.75.148.150 (ClassC) |
| Date | Domain | IP |
| mailform.nkdn2.jp | 2024-02-21 | 3.115.77.5 |
| cfn.nkdn2.jp | 2024-10-09 | 18.238.217.5 |
| www.nkdn2.jp | 2024-11-24 | 13.230.137.227 |