| Date | IP Address |
| 2021-06-03 | 143.204.166.107 (ClassC) |
| 2021-06-03 | 143.204.166.111 (ClassC) |
| 2021-10-29 | 143.204.154.8 (ClassC) |
| 2025-04-13 | 3.163.24.118 (ClassC) |
| 2025-09-27 | 3.169.173.109 (ClassC) |
| 2026-01-23 | 3.169.173.29 (ClassC) |
| Date | Domain | IP |
| data.crossref.org | 2025-11-15 | 34.206.209.141 |
| artifact.eventdata.crossref.org | 2024-02-29 | 18.244.214.82 |
| www.eventdata.crossref.org | 2024-12-04 | 3.165.160.90 |
| crossmark.crossref.org | 2025-09-19 | 208.254.38.81 |
| crossmark-cdn.crossref.org | 2019-05-15 | 13.33.147.32 |