Summary
| Registry | APNIC |
| Country | JP |
| Status | assigned |
| IP Version | IPv4 |
| Allocated | 1992-11-30 |
| Last Updated | 2026-08-26 |
| 163.131.0.0/24 | N/A | 0 | 1 | 2 |
| 163.131.1.0/24 | N/A | 0 | 1 | 1 |
| 163.131.2.0/24 | N/A | 0 | 1 | 1 |
| 163.131.3.0/24 | N/A | 0 | 1 | 1 |
| 163.131.4.0/24 | N/A | 0 | 1 | 1 |
| 163.131.5.0/24 | N/A | 0 | 1 | 1 |
| 163.131.6.0/24 | N/A | 0 | 1 | 1 |
| 163.131.7.0/24 | N/A | 0 | 1 | 1 |
| 163.131.8.0/24 | N/A | 0 | 1 | 1 |
| 163.131.9.0/24 | N/A | 0 | 1 | 1 |
| 163.131.10.0/24 | N/A | 0 | 1 | 1 |
| 163.131.11.0/24 | N/A | 0 | 1 | 1 |
| 163.131.12.0/24 | N/A | 0 | 1 | 1 |
| 163.131.13.0/24 | N/A | 0 | 1 | 1 |
| 163.131.14.0/24 | N/A | 0 | 1 | 1 |
| 163.131.15.0/24 | N/A | 0 | 1 | 1 |
| 163.131.16.0/24 | N/A | 0 | 1 | 1 |
| 163.131.17.0/24 | N/A | 0 | 1 | 1 |
| 163.131.18.0/24 | N/A | 0 | 1 | 1 |
| 163.131.19.0/24 | N/A | 0 | 1 | 1 |
| 163.131.20.0/24 | N/A | 0 | 1 | 1 |
| 163.131.21.0/24 | N/A | 0 | 1 | 1 |
| 163.131.22.0/24 | N/A | 0 | 1 | 1 |
| 163.131.23.0/24 | N/A | 0 | 1 | 1 |
| 163.131.24.0/24 | N/A | 0 | 1 | 1 |
| 163.131.25.0/24 | N/A | 0 | 1 | 1 |
| 163.131.26.0/24 | N/A | 0 | 1 | 1 |
| 163.131.27.0/24 | N/A | 0 | 1 | 1 |
| 163.131.28.0/24 | N/A | 0 | 1 | 1 |
| 163.131.29.0/24 | N/A | 0 | 1 | 1 |
| 163.131.30.0/24 | N/A | 0 | 1 | 1 |
| 163.131.31.0/24 | N/A | 0 | 1 | 1 |
| 163.131.32.0/24 | N/A | 0 | 1 | 1 |
| 163.131.64.0/24 | N/A | 0 | 1 | 1 |
| 163.131.80.0/24 | N/A | 0 | 1 | 1 |
| 163.131.96.0/24 | N/A | 0 | 1 | 1 |
| 163.131.104.0/24 | N/A | 0 | 1 | 1 |
| 163.131.108.0/24 | N/A | 0 | 1 | 1 |
| 163.131.112.0/24 | N/A | 0 | 1 | 1 |
| 163.131.116.0/24 | N/A | 0 | 1 | 1 |
| 163.131.120.0/24 | N/A | 0 | 1 | 1 |
| 163.131.124.0/24 | N/A | 0 | 1 | 1 |
| 163.131.128.0/24 | N/A | 0 | 1 | 1 |
| 163.131.192.0/24 | N/A | 0 | 1 | 1 |