| Date | IP Address |
| 2015-06-09 | 54.231.228.20 (ClassC) |
| 2015-09-10 | 54.231.225.35 (ClassC) |
| 2015-10-26 | 54.231.229.4 (ClassC) |
| 2016-08-02 | 52.219.16.6 (ClassC) |
| 2016-08-02 | 54.231.225.136 (ClassC) |
| 2017-07-07 | 52.219.4.110 (ClassC) |
| 2017-07-07 | 52.219.68.126 (ClassC) |
| 2017-07-18 | 52.219.68.114 (ClassC) |
| 2017-11-14 | 52.219.0.10 (ClassC) |
| 2018-07-23 | 52.219.68.134 (ClassC) |
| 2018-10-18 | 52.219.68.176 (ClassC) |
| 2018-11-16 | 52.219.4.14 (ClassC) |
| 2018-11-16 | 52.219.4.42 (ClassC) |
| 2018-11-18 | 52.219.4.50 (ClassC) |
| 2020-07-16 | 52.219.136.56 (ClassC) |
| 2020-07-16 | 52.219.68.86 (ClassC) |
| 2024-06-24 | 204.246.191.12 (ClassC) |
| 2024-08-10 | 204.246.191.7 (ClassC) |
| 2025-04-16 | 204.246.191.19 (ClassC) |
| 2025-05-29 | 204.246.191.90 (ClassC) |
| 2025-08-28 | 3.175.34.26 (ClassC) |
| Date | Domain | IP |
| www.chatwork.co.jp | 2024-06-24 | 204.246.191.12 |