AS637 — DNIC-ASBLK-00616-00665 - United States Department of Defense (DoD)

AS637 announces 224 IPv4 prefixes covering 929,280 addresses and 0 IPv6 prefixes.

About this network

An early US Department of Defense allocation from the block DNIC-ASBLK-00616-00665, registered to the DoD Network Information Center (DNIC).

What it's used for

• US government / military networking. The generic DNIC block registration doesn't name a specific base or unit.

Notable

• A government / DoD network, not a commercial ISP or host. Part of a contiguous block of DNIC-held ASNs.
• The low AS number reflects an allocation from the internet's earliest years, handed out roughly sequentially.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 137.232.161.0/24
• 137.232.194.0/24
• 137.233.5.0/24
• 137.234.0.0/24
• 137.234.2.0/23
• 137.234.64.0/22
• 137.234.76.0/24
• 137.234.80.0/22
• 137.234.84.0/24
• 137.234.86.0/24
• 137.234.88.0/24
• 137.234.110.0/24
• 137.234.139.0/24
• 137.234.140.0/24
• 137.234.156.0/22
• 137.234.160.0/22
• 137.234.178.0/24
• 137.234.181.0/24
• 137.234.182.0/24
• 137.234.186.0/24
• 137.234.192.0/22
• 137.234.200.0/22
• 137.234.204.0/24
• 137.234.206.0/24
• 137.234.208.0/24
• 137.234.249.0/24
• 137.235.4.0/24
• 137.235.126.0/23
• 137.235.128.0/22
• 137.235.133.0/24
• 137.235.138.0/23
• 137.235.141.0/24
• 137.235.142.0/23
• 137.235.145.0/24
• 137.235.148.0/24
• 137.235.172.0/24
• 137.235.200.0/24
• 137.235.202.0/24
• 137.235.210.0/24
• 137.235.236.0/22
• 138.156.0.0/16
• 138.157.0.0/19
• 138.157.57.0/24
• 138.157.64.0/23
• 138.157.84.0/23
• 138.157.105.0/24
• 138.157.106.0/23
• 138.157.110.0/24
• 138.157.112.0/22
• 138.157.119.0/24
• 138.157.122.0/24
• 138.157.124.0/23
• 138.157.130.0/23
• 138.157.207.0/24
• 138.157.210.0/23
• 138.157.216.0/24
• 138.157.240.0/24
• 138.158.0.0/16
• 138.163.160.0/22
• 138.167.0.0/20
• 138.167.20.0/23
• 138.167.32.0/19
• 138.167.64.0/20
• 138.167.80.0/22
• 138.167.84.0/23
• 138.167.104.0/21
• 138.167.112.0/23
• 138.167.119.0/24
• 138.167.120.0/21
• 138.167.128.0/19
• 138.167.160.0/21
• 138.167.176.0/20
• 138.167.200.0/22
• 138.167.206.0/24
• 138.167.208.0/20
• 138.167.224.0/21
• 138.167.232.0/24
• 138.167.235.0/24
• 138.167.236.0/22
• 138.167.248.0/22
• 138.168.0.0/16
• 158.236.0.0/15
• 158.238.0.0/16
• 158.239.0.0/20
• 158.239.32.0/19
• 158.239.64.0/18
• 158.239.128.0/17
• 158.240.0.0/22
• 158.240.4.0/24
• 158.240.32.0/20
• 158.240.48.0/22
• 158.240.52.0/23
• 158.240.54.0/24
• 158.240.58.0/24
• 158.240.96.0/23
• 158.240.131.0/24
• 158.240.132.0/22
• 158.240.136.0/23
• 158.240.160.0/21
• 158.240.174.0/23

and 124 more.

Upstream networks

• AS27064 United States Department of Defense (DoD)
• AS27066 United States Department of Defense (DoD)
• AS27065 United States Department of Defense (DoD)

Adjacent networks

• AS27064 United States Department of Defense (DoD)
• AS27066 United States Department of Defense (DoD)
• AS27065 United States Department of Defense (DoD)

Routing security

• RPKI: 0 valid, 0 invalid and 545 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 1% of announcements registered; 8 route objects.
• Listed in as-sets: AS-COMCAST-EDIA, AS2914:AS-3908-DOWNSTREAMS.