| Property | Value |
| Organization | J2 Global Japan Y.K. |
| NameServer | ns2.j2global.com |
| Created | 2006-02-28 00:00:00 |
| Changed | 2019-02-28 16:09:29 |
| Date | IP Address |
| 2024-01-28 | 104.18.33.105 (ClassC) |
| 2024-08-11 | 172.64.154.151 (ClassC) |
| 2025-03-10 | 104.18.19.181 (ClassC) |
| 2025-06-25 | 104.18.18.181 (ClassC) |
| Date | Domain | IP |
| portal.efax.co.jp | 2024-08-09 | 172.64.154.151 |
| ap.efax.co.jp | 2025-03-15 | 3.215.172.219 |
| www.efax.co.jp | 2019-10-14 | 104.112.173.229 |