| Date | IP Address |
| 2018-06-21 | 23.3.96.147 (ClassC) |
| 2018-06-21 | 23.3.96.130 (ClassC) |
| 2019-11-28 | 151.101.129.153 (ClassC) |
| 2021-07-25 | 151.101.53.153 (ClassC) |
| 2024-08-07 | 99.83.186.106 (ClassC) |
| 2025-06-12 | 13.248.160.137 (ClassC) |
| 2025-11-12 | 75.2.43.150 (ClassC) |
| 2026-01-23 | 76.223.34.124 (ClassC) |
| Date | Domain | IP |
| api.playoffchallenge.fantasy.nfl.com | 2013-11-25 | 96.6.46.35 |
| stage.api.playoffchallenge.fantasy.nfl.com | 2026-01-08 | 146.75.41.153 |
| dr.api.playoffchallenge.fantasy.nfl.com | 2021-07-27 | 151.101.53.153 |
| m.playoffchallenge.fantasy.nfl.com | 2015-03-06 | 23.74.9.207 |
| stage.m.playoffchallenge.fantasy.nfl.com | 2026-01-09 | 151.101.21.153 |
| rds.playoffchallenge.fantasy.nfl.com | 2024-08-25 | 99.83.186.106 |
| m.rds.playoffchallenge.fantasy.nfl.com | 2021-07-25 | 151.101.53.153 |