Summary
| Registry | ARIN |
| Country | US |
| Status | assigned |
| IP Version | IPv4 |
| Allocated | 1988-03-11 |
| Last Updated | 2026-08-26 |
| 129.121.0.0/24 | N/A | 0 | 1 | 1 |
| 129.121.32.0/24 | N/A | 0 | 1 | 1 |
| 129.121.36.0/24 | N/A | 0 | 1 | 1 |
| 129.121.40.0/24 | N/A | 0 | 1 | 1 |
| 129.121.41.0/24 | N/A | 0 | 1 | 1 |
| 129.121.44.0/24 | N/A | 0 | 1 | 1 |
| 129.121.48.0/24 | N/A | 0 | 1 | 1 |
| 129.121.55.0/24 | N/A | 0 | 1 | 1 |
| 129.121.56.0/24 | N/A | 0 | 1 | 1 |
| 129.121.60.0/24 | N/A | 0 | 1 | 1 |
| 129.121.64.0/24 | N/A | 0 | 1 | 1 |
| 129.121.72.0/24 | N/A | 0 | 1 | 1 |
| 129.121.74.0/24 | N/A | 0 | 1 | 1 |
| 129.121.76.0/24 | N/A | 0 | 1 | 1 |
| 129.121.79.0/24 | N/A | 0 | 1 | 1 |
| 129.121.80.0/24 | N/A | 0 | 1 | 1 |
| 129.121.82.0/24 | N/A | 0 | 1 | 1 |
| 129.121.84.0/24 | N/A | 0 | 1 | 1 |
| 129.121.88.0/24 | N/A | 0 | 1 | 1 |
| 129.121.92.0/24 | N/A | 0 | 1 | 1 |
| 129.121.96.0/24 | N/A | 0 | 1 | 1 |
| 129.121.100.0/24 | N/A | 0 | 1 | 1 |
| 129.121.104.0/24 | N/A | 0 | 1 | 1 |
| 129.121.108.0/24 | N/A | 0 | 1 | 1 |
| 129.121.110.0/24 | N/A | 0 | 1 | 1 |
| 129.121.112.0/24 | N/A | 0 | 1 | 1 |
| 129.121.120.0/24 | N/A | 0 | 1 | 1 |
| 129.121.128.0/24 | N/A | 0 | 1 | 1 |
| 129.121.132.0/24 | N/A | 0 | 1 | 1 |
| 129.121.136.0/24 | N/A | 0 | 1 | 1 |