AS391 — AFCONC-BLOCK1-AS

AS391 announces 40 IPv4 prefixes covering 283,648 addresses and 0 IPv6 prefixes.

About this network

A US Air Force allocation (AFCONC-BLOCK1-AS) registered to Air Force Systems Networking, part of a block of low AS numbers held by the US Air Force at Maxwell AFB / Gunter Annex in Alabama.

What it's used for

• Networking for US Air Force / Department of Defense sites.

Notable

• A US military network, not a commercial ISP or host. Belongs to a contiguous early-internet block of Air Force AS numbers registered in 1989.

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

Announced prefixes

• 128.202.0.0/16
• 128.236.0.0/16
• 131.15.38.0/23
• 131.15.40.0/22
• 131.15.44.0/23
• 131.15.46.0/24
• 131.15.48.0/21
• 131.15.56.0/22
• 131.15.60.0/23
• 131.15.62.0/24
• 131.15.65.0/24
• 131.15.68.0/22
• 131.15.73.0/24
• 131.15.74.0/23
• 131.15.76.0/22
• 131.15.80.0/24
• 131.15.88.0/24
• 131.15.90.0/23
• 131.15.92.0/24
• 131.15.98.0/23
• 131.15.120.0/24
• 131.15.136.0/24
• 131.15.144.0/21
• 131.15.160.0/21
• 131.15.208.0/24
• 131.15.233.0/24
• 131.15.234.0/23
• 131.15.236.0/22
• 131.15.252.0/23
• 137.0.0.0/16
• 137.11.0.0/16
• 143.141.96.0/22
• 199.31.2.0/23
• 199.251.155.0/24
• 199.251.156.0/24
• 204.34.211.0/24
• 206.39.56.0/24
• 206.39.58.0/24
• 207.133.179.0/24
• 207.133.189.0/24

Upstream networks

• AS27064 United States Department of Defense (DoD)

Adjacent networks

• AS27064 United States Department of Defense (DoD)