AS3428 — ESNET-AS

AS3428 announces 12 IPv4 prefixes covering 68,096 addresses and 1 IPv6 prefixes.

About this network

One of the Energy Sciences Network (ESNET-AS) autonomous systems. ESnet is the US Department of Energy's science network, connecting the national laboratories and their research collaborators. This is the largest of ESnet's low-numbered AS registrations by announced address space.

What it's used for

• Carrying research traffic for DOE laboratories and user facilities: large scientific data transfers, remote instrument access, and lab site connectivity.
• Serving the DOE research mission rather than commercial subscribers.

Notable

• This is government research address space. Hosts in it are lab systems and scientific infrastructure, not eyeball broadband or commercial hosting.
• ESnet's other AS numbers in this range: AS3425, AS3431, and AS3443.

Interesting

• Research and education networks like ESnet routinely carry per-flow volumes that would be extraordinary on a commercial network, because a single physics or genomics experiment can produce petabytes that must move between sites.

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

Announced prefixes

• 130.20.1.0/24
• 130.20.2.0/23
• 130.20.4.0/22
• 130.20.8.0/21
• 130.20.16.0/20
• 130.20.32.0/19
• 130.20.64.0/18
• 130.20.128.0/17
• 192.35.193.0/24
• 192.101.100.0/22
• 192.101.104.0/22
• 192.101.108.0/23
• 2620:0:50f0::/44

Upstream networks

• AS293 ESnet
• AS101 University of Washington

Adjacent networks

• AS293 ESnet
• AS101 University of Washington