AS5927 DNIC-ASBLK-05800-06055

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.