| Date | IP Address |
| 2024-06-13 | 104.18.43.134 (ClassC) |
| 2024-08-20 | 172.64.144.122 (ClassC) |
| 2024-09-30 | 23.46.17.24 (ClassC) |
| 2024-10-27 | 23.33.42.145 (ClassC) |
| 2024-11-11 | 23.62.46.178 (ClassC) |
| 2024-11-25 | 23.67.33.41 (ClassC) |
| 2024-12-19 | 23.67.33.37 (ClassC) |
| 2025-01-12 | 23.59.88.209 (ClassC) |
| 2025-01-21 | 23.59.88.204 (ClassC) |
| 2025-02-21 | 23.212.62.204 (ClassC) |
| 2025-03-09 | 23.216.149.142 (ClassC) |
| 2025-04-16 | 23.216.149.138 (ClassC) |
| 2025-07-08 | 23.216.147.206 (ClassC) |
| 2025-08-03 | 23.212.62.212 (ClassC) |
| 2025-08-08 | 23.216.147.200 (ClassC) |
| 2025-08-15 | 23.216.132.55 (ClassC) |
| 2026-01-17 | 23.46.228.168 (ClassC) |
| Date | Domain | IP |
| mi.zyrtec.com | 2025-12-24 | 44.232.179.184 |
| image.newsletters.zyrtec.com | 2025-06-20 | 23.55.167.10 |
| click.newsletters.zyrtec.com | 2024-08-11 | 13.111.90.82 |
| www.zyrtec.com | 2024-11-25 | 23.54.19.186 |