199.57.136.0/21 covers 199.57.136.0 to 199.57.143.255, 2,048 IPv4 addresses. It is announced by AS1914 (United States Department of Defense DoD). Every sampled address geolocates to United States, with 100% in Columbus. It is registered to a government network. None of the sampled addresses are flagged as VPN, proxy or Tor.
| Prefix | First IP | Last IP | No. of IPs |
|---|---|---|---|
| 199.57.136.0/24 | |||
| 199.57.137.0/24 | |||
| 199.57.138.0/24 | |||
| 199.57.139.0/24 | |||
| 199.57.140.0/24 | |||
| 199.57.141.0/24 | |||
| 199.57.142.0/24 | |||
| 199.57.143.0/24 |
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