Autonomous system
AS3671 SLAC - SLAC National Accelerator Laboratory
Unclassified ARIN
Summary
SLAC National Accelerator Laboratory
government research legacy
SLAC is the network of the SLAC National Accelerator Laboratory in Menlo Park, California — a US Department of Energy national laboratory operated by Stanford University.
What it's used for
- Research networking for SLAC's particle physics, photon science, and computing programs.
- Moving experimental data: accelerator and light-source facilities generate very large datasets that must be shipped to collaborators and compute sites.
Notable
- National-lab address space is scientific infrastructure — instruments, compute clusters, and data movers — not consumer or commercial hosting.
- SLAC has long been a heavy user of research networking, and its traffic profile looks unlike a normal enterprise: few endpoints, enormous flows.
Interesting
- SLAC ran one of the earliest web servers outside Europe, standing up the first web server in North America in 1991 after contact with CERN.
- A low AS number here reflects how early the DOE laboratory system connected to the internet, well ahead of most commercial networks.
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 2026-11-05, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 65.79K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 3 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS3671- Registry name
- SLAC
- Registrant
- SLAC National Accelerator Laboratory
- Abuse contact
- security@slac.stanford.edu
- Registered
- 1994-06-10
- Last changed
- 2012-04-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 3 valid, 0 with no ROA
- ROAs
- 4 authorising AS3671
- ASPA
- 2 declared providers
- IRR
- 100% registered · 3 of 3 announcements
- Route objects
- 12 naming AS3671
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: 454 networks and 1,854 prefixes, as published 2026-11-06. 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