Autonomous system
AS4539 SEL-AS
Unclassified RIPE
Summary
Schweitzer Engineering Laboratories (SEL)
enterprise legacy
SEL-AS — Schweitzer Engineering Laboratories, the employee-owned manufacturer in Pullman, Washington that builds protective relays, automation, and control systems for electric power grids.
What it's used for
- Corporate networking for a manufacturer and its engineering organisation: about 1,024 IPv4 addresses, sized for the company itself rather than customers.
Notable
- An industrial/OT vendor running its own AS — the address space is the company's own, not sold on.
- The ASN was registered to SEL in 2009, so AS4539 is a reissued low number and carries no early-internet history for this holder.
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 2 prefixes · 1.02K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS4539- Registry name
- SEL-AS
- Registrant
- Schweitzer Engineering Laboratories, Inc.
- Abuse contact
- greg_laprade@selinc.com
- Registered
- 2009-09-17
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS4539
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 1 naming AS4539
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 1,778 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