| Date | IP Address |
| 2014-06-24 | 162.144.4.13 (ClassC) |
| 2019-07-22 | 52.9.213.139 (ClassC) |
| 2020-01-19 | 13.57.132.171 (ClassC) |
| 2020-06-02 | 52.52.232.4 (ClassC) |
| 2020-07-14 | 52.9.81.213 (ClassC) |
| 2020-11-18 | 52.52.153.14 (ClassC) |
| 2021-01-08 | 13.57.147.3 (ClassC) |
| 2022-05-11 | 52.8.53.190 (ClassC) |
| 2025-07-08 | 75.2.86.53 (ClassC) |
| 2025-08-07 | 99.83.232.3 (ClassC) |
| Date | Domain | IP |
| mx10.rpg.org | 2025-05-05 | 99.83.232.3 |
| mx01.rpg.org | 2025-05-05 | 75.2.86.53 |
| exchange.rpg.org | 2025-03-22 | 99.83.232.3 |
| newmail.rpg.org | 2025-03-23 | 99.83.232.3 |
| mailer.rpg.org | 2025-03-18 | 75.2.86.53 |
| www.rpg.org | 2025-03-29 | 75.2.86.53 |
| mailrelay.rpg.org | 2025-04-05 | 99.83.232.3 |