AS5927 — DNIC-ASBLK-05800-06055

AS5927 announces 14 IPv4 prefixes covering 6,144 addresses and 9 IPv6 prefixes.

About this network

A US Department of Defense network from the block DNIC-ASBLK-05800-06055, registered to the DoD Network Information Center (DNIC). It is the AS that announces G-root, one of the thirteen DNS root name servers.

What it's used for

• Announcing the address space behind g.root-servers.net (192.112.36.0/24 and 2001:500:12::/48), the root server operated by the Defense Information Systems Agency (DISA).
• General DoD network operations across a spread of DNIC-held ranges, including 214.x space from the DoD-held /8s.

Notable

• A government / DoD network, not a commercial ISP or host. Of the thirteen root server letters, G is the one run by a military organisation.
• G-root is anycast from multiple sites worldwide, so the AS is US-registered but its routes are visible globally.
• Part of a contiguous run of ASNs (5800–6055) held by the DoD Network Information Center.

Interesting

• The root-server address 192.112.36.4 has been stable for decades, which is the whole point: root server addresses are baked into the root hints file shipped with essentially every recursive resolver, so they can effectively never change.

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

Announced prefixes

• 192.112.36.0/24
• 192.112.38.0/24
• 192.240.128.0/24
• 192.240.130.0/23
• 192.240.132.0/22
• 192.240.137.0/24
• 192.240.138.0/23
• 192.240.140.0/22
• 192.240.144.0/23
• 199.252.155.0/24
• 207.132.116.0/23
• 214.37.176.0/24
• 214.72.20.0/24
• 214.72.30.0/24
• 2001:500:12::/48
• 2608:120:c::/48
• 2608:140:c::/48
• 2608:144:5e51::/48
• 2608:148:5d70::/48
• 2608:4122:2::/48
• 2608:4163:1::/48
• 2608:c144:1::/48
• 2608:c184:1::/48

Upstream networks

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

Adjacent networks

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