| Date | IP Address |
| 2025-10-30 | 34.225.250.61 (ClassC) |
| 2025-11-17 | 44.209.147.177 (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 |