| Date | IP Address |
| 2023-06-15 | 52.7.1.114 (ClassC) |
| 2023-07-25 | 3.211.194.5 (ClassC) |
| 2025-09-29 | 13.219.122.171 (ClassC) |
| 2025-12-30 | 23.23.8.109 (ClassC) |
| 2026-01-03 | 3.211.45.153 (ClassC) |
| Date | Domain | IP |
| api.fast4sign.com.br | 2025-08-05 | 34.196.176.213 |
| app.fast4sign.com.br | 2025-09-29 | 13.219.122.171 |