AS1540 — DNIC-ASBLK-01534-01546 - Headquarters, USAISC

AS1540 announces 867 IPv4 prefixes covering 7,430,144 addresses and 63 IPv6 prefixes.

About this network

AS1540 is a US Department of Defense network, part of the block registered to the DoD Network Information Center (DNIC-ASBLK-01534-01546).

What it's used for

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

Notable

• A government / DoD network, not a commercial ISP or hosting provider.
• Registered to the DoD Network Information Center (DNIC), holder of many contiguous low-numbered federal ASNs.

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

Announced prefixes

• 6.16.48.0/24
• 6.16.51.0/24
• 6.16.52.0/24
• 6.16.66.0/23
• 6.16.68.0/22
• 6.16.72.0/23
• 6.16.76.0/22
• 6.16.80.0/23
• 6.16.90.0/23
• 6.16.92.0/22
• 6.16.96.0/23
• 6.16.100.0/22
• 6.16.104.0/22
• 6.16.112.0/23
• 6.16.115.0/24
• 6.17.80.0/24
• 6.17.88.0/21
• 6.41.0.0/16
• 6.42.56.0/22
• 6.42.60.0/23
• 6.42.64.0/18
• 6.42.128.0/19
• 6.42.160.0/20
• 6.42.176.0/21
• 6.42.184.0/22
• 6.42.188.0/23
• 6.42.192.0/19
• 6.42.224.0/21
• 6.42.232.0/22
• 6.42.243.0/24
• 6.42.244.0/22
• 6.44.0.0/17
• 6.44.128.0/18
• 6.44.197.0/24
• 6.45.32.0/20
• 6.48.64.0/20
• 6.50.40.0/24
• 6.64.128.0/23
• 6.64.138.0/23
• 6.64.146.0/24
• 6.64.151.0/24
• 6.64.152.0/24
• 6.64.157.0/24
• 6.64.159.0/24
• 6.64.162.0/23
• 6.64.166.0/24
• 6.65.4.0/24
• 6.65.6.0/24
• 6.65.8.0/22
• 6.65.16.0/24
• 6.65.20.0/22
• 6.65.26.0/23
• 6.65.34.0/23
• 6.65.36.0/22
• 6.65.40.0/24
• 6.65.44.0/22
• 6.65.48.0/22
• 6.65.58.0/23
• 6.65.130.0/23
• 6.65.132.0/22
• 6.65.136.0/21
• 6.65.144.0/20
• 6.65.160.0/20
• 6.65.176.0/21
• 6.65.184.0/22
• 6.66.2.0/23
• 6.66.4.0/22
• 6.66.8.0/21
• 6.66.16.0/22
• 6.66.20.0/24
• 6.66.22.0/23
• 6.66.24.0/21
• 6.66.32.0/21
• 6.66.40.0/22
• 6.66.56.0/21
• 6.66.66.0/23
• 6.66.68.0/22
• 6.66.72.0/21
• 6.66.80.0/20
• 6.66.96.0/19
• 6.66.128.0/20
• 6.66.144.0/21
• 6.66.152.0/22
• 6.66.157.0/24
• 6.66.158.0/24
• 6.66.224.0/22
• 6.66.228.0/24
• 6.66.230.0/23
• 6.66.232.0/22
• 6.66.236.0/24
• 6.66.238.0/23
• 6.67.32.0/23
• 6.67.35.0/24
• 6.67.36.0/24
• 6.68.0.0/16
• 6.69.6.0/23
• 6.69.8.0/21
• 6.69.16.0/20
• 6.69.32.0/20
• 6.69.48.0/21

and 830 more.

Upstream networks

• AS27064 United States Department of Defense (DoD)
• AS27065 United States Department of Defense (DoD)
• AS367 United States Department of Defense (DoD)

Downstream networks

• AS306 United States Department of Defense (DoD)
• AS1493 Headquarters, USAISC
• AS1554 United States Department of Defense (DoD)
• AS153 Headquarters, USAISC
• AS6006 United States Department of Defense (DoD)
• AS588 Headquarters, USAISC

Adjacent networks

• AS27064 United States Department of Defense (DoD)
• AS306 United States Department of Defense (DoD)
• AS27065 United States Department of Defense (DoD)
• AS367 United States Department of Defense (DoD)
• AS1554 United States Department of Defense (DoD)
• AS1493 Headquarters, USAISC
• AS153 Headquarters, USAISC
• AS6006 United States Department of Defense (DoD)
• AS588 Headquarters, USAISC

Routing security

• RPKI: 0 valid, 0 invalid and 2,287 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 0% of announcements registered; 1 route objects.