| Date | IP Address |
| 2023-06-05 | 118.112.225.41 (ClassC) |
| 2024-01-09 | 36.147.44.100 (ClassC) |
| 2024-12-17 | 111.47.229.244 (ClassC) |
| 2025-06-26 | 116.207.181.167 (ClassC) |
| 2025-08-04 | 42.225.101.116 (ClassC) |
| 2025-09-15 | 116.162.224.38 (ClassC) |
| 2026-02-05 | 183.204.231.139 (ClassC) |
| Date | Domain | IP |
| pic.51ifonts.com | 2025-06-20 | 182.242.219.8 |
| download.51ifonts.com | 2025-05-30 | 122.228.207.55 |
| api.51ifonts.com | 2026-01-25 | 47.103.163.163 |
| renderer.51ifonts.com | 2025-11-22 | 111.174.12.113 |
| js.51ifonts.com | 2025-08-04 | 42.225.101.116 |
| oss.51ifonts.com | 2025-06-20 | 182.242.219.7 |
| www.51ifonts.com | 2025-09-21 | 106.14.97.37 |