216.21.0.0/16
34 assigned ranges in this /16.
/24 breakdown
| Block | Top country | Countries | ASNs | Ranges |
|---|---|---|---|---|
| 216.21.1.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.2.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.4.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.8.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.12.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.14.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.15.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.17.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.18.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.24.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.32.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.64.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.96.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.128.0/24 | Canada (100%) | 1 | 1 | 1 |
| 216.21.160.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.176.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.184.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.192.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.208.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.212.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.216.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.224.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.226.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.228.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.230.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.231.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.233.0/24 | Canada (100%) | 1 | 1 | 1 |
| 216.21.234.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.237.0/24 | Canada (100%) | 1 | 1 | 1 |
| 216.21.238.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.240.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.244.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.245.0/24 | United States (100%) | 1 | 1 | 1 |
| 216.21.247.0/24 | United States (100%) | 1 | 1 | 1 |
Assigned ranges
| Range | ASN | Org | Country |
|---|---|---|---|
216.21.1.0 – 216.21.1.255 | AS63476 | SMS Assist L.L.C. | US |
216.21.2.0 – 216.21.3.255 | AS715 | WoodyNet Inc. | US |
216.21.4.0 – 216.21.7.255 | AS40279 | ForestRacks | US |
216.21.8.0 – 216.21.11.255 | AS46413 | Fulair LLC | US |
216.21.12.0 – 216.21.13.255 | AS53334 | Total Uptime Technologies LLC | US |
216.21.14.0 – 216.21.14.255 | AS7377 | University of California San Diego | US |
216.21.15.0 – 216.21.15.255 | AS11233 | Gorge Networks LLC | US |
216.21.17.0 – 216.21.17.255 | AS400441 | WINAC | US |
216.21.18.0 – 216.21.19.255 | AS5721 | National Defense University | US |
216.21.24.0 – 216.21.31.255 | AS40266 | SpeedyQuick Networks Inc | US |
216.21.32.0 – 216.21.63.255 | AS16399 | First Communications LLC | US |
216.21.64.0 – 216.21.95.255 | AS16423 | NETTOGO | US |
216.21.96.0 – 216.21.127.255 | AS15116 | Pittsburg State University | US |
216.21.128.0 – 216.21.159.255 | AS21723 | GOCO TECHNOLOGY LIMITED PARTNERSHIP | CA |
216.21.160.0 – 216.21.175.255 | AS16591 | Google Fiber Inc. | US |
19 more ranges in this block.