Summary
| Registry | ARIN |
| Country | US |
| Status | assigned |
| IP Version | IPv4 |
| Allocated | 1987-03-24 |
| Last Updated | 2026-08-26 |
| 128.221.192.0/24 | N/A | 0 | 1 | 1 |
| 128.221.204.0/24 | N/A | 0 | 1 | 1 |
| 128.221.208.0/24 | N/A | 0 | 1 | 1 |
| 128.221.209.0/24 | N/A | 0 | 1 | 1 |
| 128.221.210.0/24 | N/A | 0 | 1 | 1 |
| 128.221.211.0/24 | N/A | 0 | 1 | 1 |
| 128.221.212.0/24 | N/A | 0 | 1 | 1 |
| 128.221.213.0/24 | N/A | 0 | 1 | 1 |
| 128.221.214.0/24 | N/A | 0 | 1 | 1 |
| 128.221.215.0/24 | N/A | 0 | 1 | 1 |
| 128.221.216.0/24 | N/A | 0 | 1 | 1 |
| 128.221.217.0/24 | N/A | 0 | 1 | 1 |
| 128.221.218.0/24 | N/A | 0 | 1 | 1 |
| 128.221.219.0/24 | N/A | 0 | 1 | 1 |
| 128.221.220.0/24 | N/A | 0 | 1 | 1 |
| 128.221.221.0/24 | N/A | 0 | 1 | 1 |
| 128.221.222.0/24 | N/A | 0 | 1 | 1 |
| 128.221.223.0/24 | N/A | 0 | 1 | 1 |
| 128.221.224.0/24 | N/A | 0 | 1 | 1 |
| 128.221.225.0/24 | N/A | 0 | 1 | 1 |
| 128.221.226.0/24 | N/A | 0 | 1 | 1 |
| 128.221.227.0/24 | N/A | 0 | 1 | 1 |
| 128.221.228.0/24 | N/A | 0 | 1 | 1 |
| 128.221.230.0/24 | N/A | 0 | 1 | 1 |
| 128.221.231.0/24 | N/A | 0 | 1 | 1 |
| 128.221.232.0/24 | N/A | 0 | 1 | 1 |
| 128.221.233.0/24 | N/A | 0 | 1 | 1 |
| 128.221.234.0/24 | N/A | 0 | 1 | 1 |
| 128.221.235.0/24 | N/A | 0 | 1 | 1 |
| 128.221.236.0/24 | N/A | 0 | 1 | 1 |
| 128.221.237.0/24 | N/A | 0 | 1 | 1 |
| 128.221.238.0/24 | N/A | 0 | 1 | 1 |
| 128.221.239.0/24 | N/A | 0 | 1 | 1 |
| 128.221.248.0/24 | N/A | 0 | 1 | 1 |