Autonomous system
AS3428 ESNET-AS
Unclassified ARIN
Summary
ESnet (Energy Sciences Network)
government research legacy
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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-19, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 12 prefixes · 68.10K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 13 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS3425- Registry name
- ESNET-AS
- Registrant
- ESnet
- Abuse contact
- hostmaster@es.net
- Registered
- 1994-02-17
- Last changed
- 2012-04-10
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 17% valid · 1 valid, 5 with no ROA
- ROAs
- 1 authorising AS3428
- ASPA
- no ASPA record
- IRR
- 100% registered · 6 of 6 announcements
- Route objects
- 7 naming AS3428
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,783 prefixes, as published 2026-10-20. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere