AS1561 — DNIC-ASBLK-01550-01601

AS1561 announces 8 IPv4 prefixes covering 65,280 addresses and 0 IPv6 prefixes.

About this network

An early US Department of Defense allocation from the block DNIC-ASBLK-01550-01601, registered to the DoD Network Information Center (DNIC).

What it's used for

• US government / military network operations. The generic DNIC block registration doesn't name a specific base or unit.

Notable

• A government / DoD network, not a commercial ISP or host. It sits in a contiguous block of low-numbered ASNs (01550–01601) held by the DoD Network Information Center.
• The low AS number reflects an allocation from the internet's earliest years, handed out roughly sequentially.

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

Announced prefixes

• 6.126.0.0/20
• 6.126.17.0/24
• 6.126.18.0/23
• 6.126.20.0/22
• 6.126.24.0/21
• 6.126.32.0/19
• 6.126.64.0/18
• 6.126.128.0/17

Upstream networks

• AS1554 United States Department of Defense (DoD)

Adjacent networks

• AS1554 United States Department of Defense (DoD)