| Date | IP Address |
| 2018-01-05 | 52.11.108.35 (ClassC) |
| 2025-11-23 | 216.198.53.6 (ClassC) |
| Date | Domain | IP |
| dl1.sorimachi.co.jp | 2023-08-31 | 52.219.4.139 |
| qa.sorimachi.co.jp | 2025-11-23 | 216.198.53.6 |
| faq.invoice-oh.sorimachi.co.jp | 2025-03-08 | 216.198.54.1 |
| member.sorimachi.co.jp | 2025-05-23 | 35.79.115.140 |
| support.sorimachi.co.jp | 2025-08-17 | 52.192.213.73 |
| www.sorimachi.co.jp | 2024-06-17 | 13.113.144.135 |