| Date | IP Address |
| 2016-04-22 | 23.74.9.217 (ClassC) |
| 2016-05-02 | 209.133.57.105 (ClassC) |
| 2017-01-18 | 23.63.227.168 (ClassC) |
| 2020-07-07 | 173.223.14.145 (ClassC) |
| 2021-05-29 | 104.94.77.31 (ClassC) |
| 2023-02-02 | 23.2.94.76 (ClassC) |
| 2023-02-17 | 23.219.237.26 (ClassC) |
| 2023-08-25 | 23.37.222.138 (ClassC) |
| 2023-10-19 | 23.66.168.183 (ClassC) |
| 2024-01-14 | 23.60.73.75 (ClassC) |
| 2024-08-01 | 104.97.45.70 (ClassC) |
| 2024-11-24 | 23.218.185.6 (ClassC) |
| 2025-04-07 | 104.71.213.90 (ClassC) |
| 2025-08-06 | 184.31.197.9 (ClassC) |
| Date | Domain | IP |
| cert.staging-x1.letsencrypt.org | 2023-08-25 | 2.19.142.66 |
| cert.stg-int-x1.letsencrypt.org | 2023-08-25 | 23.37.222.138 |
| ocsp.int-x1.letsencrypt.org | 2023-12-28 | 23.219.78.167 |
| cert.int-x1.letsencrypt.org | 2023-08-25 | 23.37.222.138 |
| cert.stg-root-x1.letsencrypt.org | 2023-08-25 | 2.19.142.66 |
| crl.root-x1.letsencrypt.org | 2023-08-25 | 23.37.222.138 |
| cp.root-x1.letsencrypt.org | 2023-08-25 | 2.19.142.66 |
| ocsp.root-x1.letsencrypt.org | 2024-01-14 | 23.219.78.177 |
| cps.root-x1.letsencrypt.org | 2023-08-25 | 23.37.222.138 |
| cert.root-x1.letsencrypt.org | 2023-08-25 | 23.37.222.138 |
| ocsp.int-x2.letsencrypt.org | 2024-04-27 | 23.219.78.167 |
| cert.int-x2.letsencrypt.org | 2023-08-25 | 2.19.142.66 |
| ocsp.int-x3.letsencrypt.org | 2019-08-05 | 104.86.183.80 |