199.21.0.0/16
59 assigned ranges in this /16.
/24 breakdown
| Block | Top country | Countries | ASNs | Ranges |
|---|---|---|---|---|
| 199.21.15.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.18.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.23.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.28.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.52.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.54.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.64.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.72.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.74.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.76.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.77.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.81.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.84.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.88.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.92.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.94.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.95.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.96.0/24 | Serbia (100%) | 1 | 1 | 1 |
| 199.21.100.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.111.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.112.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.120.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.128.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.129.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.130.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.132.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.136.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.144.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.148.0/24 | Canada (100%) | 1 | 1 | 1 |
| 199.21.152.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.160.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.163.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.164.0/24 | Saint Kitts and Nevis (100%) | 1 | 1 | 1 |
| 199.21.168.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.172.0/24 | Thailand (100%) | 1 | 1 | 1 |
| 199.21.176.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.180.0/24 | Canada (100%) | 1 | 1 | 1 |
| 199.21.181.0/24 | Canada (100%) | 1 | 1 | 1 |
| 199.21.182.0/24 | Canada (100%) | 1 | 1 | 1 |
| 199.21.183.0/24 | Canada (100%) | 1 | 1 | 1 |
| 199.21.184.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.188.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.192.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.196.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.198.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.200.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.202.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.203.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.208.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.209.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.216.0/24 | Canada (100%) | 1 | 1 | 1 |
| 199.21.220.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.224.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.231.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.232.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.240.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.247.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.248.0/24 | United States (100%) | 1 | 1 | 1 |
| 199.21.252.0/24 | United States (100%) | 1 | 1 | 1 |
Assigned ranges
| Range | ASN | Org | Country |
|---|---|---|---|
199.21.15.0 – 199.21.15.255 | AS394144 | LTY CONNECT | US |
199.21.18.0 – 199.21.18.255 | AS10962 | Cerner Corporation | US |
199.21.23.0 – 199.21.23.255 | AS10962 | Cerner Corporation | US |
199.21.28.0 – 199.21.31.255 | AS10962 | Cerner Corporation | US |
199.21.52.0 – 199.21.52.255 | AS3257 | GTT Communications Inc. | US |
199.21.54.0 – 199.21.54.255 | AS20331 | Onity Group Inc. | US |
199.21.64.0 – 199.21.71.255 | AS17378 | TierPoint LLC | US |
199.21.72.0 – 199.21.72.255 | AS26974 | bigbyte.cc Corp | US |
199.21.74.0 – 199.21.75.255 | AS26974 | bigbyte.cc Corp | US |
199.21.76.0 – 199.21.76.255 | AS12179 | Unitas Global | US |
199.21.77.0 – 199.21.79.255 | AS32475 | Internap Holding LLC | US |
199.21.81.0 – 199.21.81.255 | AS14742 | Unitas Global | US |
199.21.84.0 – 199.21.87.255 | AS19165 | Webpass Inc. | US |
199.21.88.0 – 199.21.91.255 | AS400933 | Citizens Telephone Company of Higginsville Missouri | US |
199.21.92.0 – 199.21.93.255 | AS62943 | Missouri Network Alliance LLC | US |
44 more ranges in this block.