| Date | IP Address |
| 2023-03-13 | 92.205.3.60 (ClassC) |
| 2025-01-02 | 172.67.218.184 (ClassC) |
| 2025-04-20 | 104.21.80.1 (ClassC) |
| 2025-05-01 | 104.21.16.1 (ClassC) |
| 2025-11-29 | 104.21.45.199 (ClassC) |
| Date | Domain | IP |
| cpanel.knockknock.delivery | 2025-04-25 | 104.21.112.1 |
| mail.knockknock.delivery | 2025-01-02 | 172.67.218.184 |