AS5371 — AS5371

AS5371 announces 133 IPv4 prefixes covering 196,352 addresses and 0 IPv6 prefixes.

About this network

A US Department of Defense network from the block DNIC-ASBLK-05120-05376, registered to the DoD Network Information Center (DNIC).

What it's used for

• Operational US Navy networking, and at considerable scale: it originates hundreds of prefixes, essentially all from legacy 205.x space registered to the Navy Network Information Center (NNIC).

Notable

• A government / military network, not a commercial ISP or host.
• One of the busiest ASNs in the DNIC block by prefix count, announcing many small blocks rather than a few large ones — a pattern that fits a network stitched together from many separately assigned sites.
• The ASN registration is generic to the DoD block, so no specific command or installation is publicly identified.

Interesting

• The Navy's address space is spread across a great many small legacy blocks rather than consolidated into a few aggregates, which is why a single Navy ASN can end up carrying a routing table entry count out of proportion to the amount of address space it actually holds.

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

Announced prefixes

• 205.56.0.0/19
• 205.56.55.0/24
• 205.56.56.0/24
• 205.56.58.0/23
• 205.56.81.0/24
• 205.56.82.0/23
• 205.56.129.0/24
• 205.57.0.0/20
• 205.57.16.0/21
• 205.57.24.0/23
• 205.57.26.0/24
• 205.57.101.0/24
• 205.57.102.0/24
• 205.58.120.0/24
• 205.58.202.0/23
• 205.58.204.0/24
• 205.58.232.0/23
• 205.58.234.0/24
• 205.58.249.0/24
• 205.58.251.0/24
• 205.58.252.0/23
• 205.59.32.0/20
• 205.59.48.0/23
• 205.59.51.0/24
• 205.59.53.0/24
• 205.59.54.0/23
• 205.59.56.0/24
• 205.59.140.0/22
• 205.59.145.0/24
• 205.59.146.0/23
• 205.59.148.0/22
• 205.59.152.0/24
• 205.59.156.0/23
• 205.59.159.0/24
• 205.59.160.0/20
• 205.59.176.0/23
• 205.60.130.0/23
• 205.60.132.0/22
• 205.60.136.0/22
• 205.60.140.0/23
• 205.60.142.0/24
• 205.60.144.0/21
• 205.60.152.0/24
• 205.60.170.0/23
• 205.60.172.0/23
• 205.60.175.0/24
• 205.61.56.0/21
• 205.61.64.0/23
• 205.61.68.0/24
• 205.61.70.0/23
• 205.61.104.0/22
• 205.61.108.0/23
• 205.65.44.0/22
• 205.65.128.0/22
• 205.65.176.0/22
• 205.65.187.0/24
• 205.65.188.0/24
• 205.66.15.0/24
• 205.66.16.0/22
• 205.66.20.0/23
• 205.66.31.0/24
• 205.66.32.0/22
• 205.66.36.0/23
• 205.68.224.0/19
• 205.70.128.0/20
• 205.70.144.0/21
• 205.70.152.0/24
• 205.70.192.0/20
• 205.71.112.0/20
• 205.71.128.0/19
• 205.71.163.0/24
• 205.71.164.0/24
• 205.71.192.0/21
• 205.71.200.0/23
• 205.71.208.0/20
• 205.71.240.0/20
• 205.72.112.0/20
• 205.72.128.0/20
• 205.72.144.0/22
• 205.72.148.0/23
• 205.72.153.0/24
• 205.72.192.0/20
• 205.73.59.0/24
• 205.73.64.0/20
• 205.73.128.0/19
• 205.75.112.0/20
• 205.78.0.0/20
• 205.78.16.0/21
• 205.78.24.0/22
• 205.78.28.0/24
• 205.78.42.0/23
• 205.78.53.0/24
• 205.78.54.0/23
• 205.78.91.0/24
• 205.78.92.0/23
• 205.78.134.0/23
• 205.78.136.0/21
• 205.78.144.0/21
• 205.78.152.0/23
• 205.78.154.0/24

and 33 more.

Upstream networks

• AS27064 United States Department of Defense (DoD)

Adjacent networks

• AS27064 United States Department of Defense (DoD)