66.81.0.0/16
46 assigned ranges in this /16.
/24 breakdown
| Block | Top country | Countries | ASNs | Ranges |
|---|---|---|---|---|
| 66.81.2.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.5.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.8.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.9.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.16.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.28.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.30.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.36.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.38.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.48.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.56.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.81.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.82.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.88.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.96.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.106.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.108.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.112.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.124.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.133.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.134.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.136.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.139.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.144.0/24 | Italy (100%) | 1 | 1 | 1 |
| 66.81.152.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.160.0/24 | Spain (100%) | 1 | 1 | 1 |
| 66.81.192.0/24 | British Virgin Islands (100%) | 1 | 1 | 1 |
| 66.81.195.0/24 | British Virgin Islands (100%) | 1 | 1 | 1 |
| 66.81.203.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.204.0/24 | British Virgin Islands (100%) | 1 | 1 | 1 |
| 66.81.208.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.212.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.216.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.220.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.224.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.227.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.228.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.231.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.232.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.240.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.241.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.242.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.247.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.248.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.254.0/24 | United States (100%) | 1 | 1 | 1 |
| 66.81.255.0/24 | United States (100%) | 1 | 1 | 1 |
Assigned ranges
| Range | ASN | Org | Country |
|---|---|---|---|
66.81.2.0 – 66.81.3.255 | AS14265 | TPx Communications | US |
66.81.5.0 – 66.81.6.255 | AS14265 | TPx Communications | US |
66.81.8.0 – 66.81.8.255 | AS16509 | Amazon.com Inc. | US |
66.81.9.0 – 66.81.13.255 | AS14265 | TPx Communications | US |
66.81.16.0 – 66.81.27.255 | AS14265 | TPx Communications | US |
66.81.28.0 – 66.81.29.255 | AS19864 | HFA Specialty Assets LLC | US |
66.81.30.0 – 66.81.31.255 | AS14265 | TPx Communications | US |
66.81.36.0 – 66.81.37.255 | AS19864 | HFA Specialty Assets LLC | US |
66.81.38.0 – 66.81.39.255 | AS14265 | TPx Communications | US |
66.81.48.0 – 66.81.49.255 | AS11915 | TPx Communications | US |
66.81.56.0 – 66.81.80.255 | AS14265 | TPx Communications | US |
66.81.81.0 – 66.81.81.255 | AS14618 | Amazon.com Inc. | US |
66.81.82.0 – 66.81.83.255 | AS14265 | TPx Communications | US |
66.81.88.0 – 66.81.94.255 | AS14265 | TPx Communications | US |
66.81.96.0 – 66.81.102.255 | AS14265 | TPx Communications | US |
31 more ranges in this block.