AS4155 — USDA-1

AS4155 announces 20 IPv4 prefixes covering 3,147,776 addresses and 1 IPv6 prefixes.

About this network

USDA-1 belongs to the United States Department of Agriculture, the federal executive department responsible for food, agriculture, rural development, and forestry policy.

What it's used for

• Enterprise networking for USDA and its agencies, which include the Forest Service, the Agricultural Research Service, the Farm Service Agency, and the Natural Resources Conservation Service.
• Connectivity for a highly distributed footprint: USDA runs field and service offices in essentially every US county, plus research stations and labs.

Notable

• This is government address space, not consumer space. Traffic from it generally represents federal staff, field offices, and agency systems rather than residential users.
• USDA holds a very large legacy IPv4 allocation for a civilian agency, including the 199.128.0.0/11 block, which alone is over two million addresses. The total announced footprint runs to several million addresses.

Interesting

• The size of the allocation is a fingerprint of early-internet federal networking, when agencies could request address space far in excess of what a modern organization of the same size would ever receive.

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

Announced prefixes

• 147.49.0.0/16
• 150.118.0.0/15
• 150.120.0.0/16
• 151.121.0.0/16
• 160.232.0.0/16
• 162.79.0.0/16
• 165.221.0.0/16
• 166.2.0.0/15
• 166.4.0.0/14
• 168.68.0.0/16
• 170.144.0.0/16
• 192.12.9.0/24
• 192.73.224.0/24
• 192.84.74.0/24
• 192.86.24.0/24
• 192.131.1.0/24
• 192.195.241.0/24
• 192.231.33.0/24
• 198.22.127.0/24
• 199.128.0.0/11
• 2600:1200::/24

Upstream networks

• AS6223 CenturyLink Communications, LLC
• AS4296 CenturyLink Communications, LLC
• AS4297 CenturyLink Communications, LLC
• AS6224 CenturyLink Communications, LLC

Adjacent networks

• AS6223 CenturyLink Communications, LLC
• AS4296 CenturyLink Communications, LLC
• AS4297 CenturyLink Communications, LLC
• AS6224 CenturyLink Communications, LLC